This is completely natural. By using simple random sampling, select states to be part of the cluster. To four decimal places, 9/25 = 0.3600 and 9/24 = 0.3750. There are many different potential problems that can affect the reliability of a sample. However, generally, we use age as a discrete variable. feet, 190 sq. If the survey is done well, the answer is yes. O A. Zanas house is at A, 500 feet from the intersection, and Tan's house is at B, 750 feet from F. Which distance is longer, the distance from Zana's house to Tan's house or the distance from Theresa's house to Is house? Save my name, email, and website in this browser for the next time I comment. state whether the data is continous or discrete The durations of Divide your college faculty by department. However, in the real world age is often treated as a discrete variable because it makes more sense when collecting data and when reporting the results of a study. 2003-2023 Chegg Inc. All rights reserved. c. The data are continuous because the data can take on any value in an interval. These kinds of data are also known as Numerical data. Students often ask if it is "good enough" to take a sample, instead of surveying the entire population. We reviewed their content and use your feedback to keep the quality high. Which pair is farther from camp? O A. Data may be classified as qualitative, quantitative continuous, or quantitative discrete. The amount of money they spend on books is as follows: $128; $87; $173; $116; $130; $204; $147; $189; $93; $153. If these data-driven topics got you interested in pursuing professional courses or a career in the field of Data Science. To choose a simple random sample of size three from the other members of her class, Lisa could put all 31 names in a hat, shake the hat, close her eyes, and pick out three names. Arrow over to PRB. Items a, e, f, k, and l are quantitative discrete; items d, j, and n are quantitative continuous; items b, c, g, h, i, and m are qualitative. Compare the fractions 999/10,000 and 999/9,999. It is classified into two broad categories: qualitative data and quantitative data. The Pareto chart has the bars sorted from largest to smallest and is easier to read and interpret. The data are continuous because the data can take on any value in an interval. Compared to nominal data, ordinal data have some kind of order that is not present in nominal data. The numbers of hotels in cities Choose the correct answer below. Misleading use of data: improperly displayed graphs, incomplete data, or lack of context. Determine whether the data described below are qualitative or quantitative and explain why: . A high school principal polls 50 freshmen, 50 sophomores, 50 juniors, and 50 seniors regarding policy changes for after school activities. The areas of the lawns are 144 sq. The data she collects are summarized in the pie chart Figure \(\PageIndex{1}\). The departments are the clusters. But still, their samples would be, in all likelihood, different from each other. Question: State whether the data described below are discrete or continuous, and explain why. If you feel like your doubt is stupid and you skip it rather than ask it, it is not the correct approach. Your phone book contains 20,000 residence listings. State whether the data described below are discrete or continuous, and explain why. All the members from these clusters are in the cluster sample. Problems with samples: A sample must be representative of the population. The data are discrete because the data can only take on specific values. Doreen and Jung each take samples of 500 students. Your IP: State whether the data described below are discrete or continuous, and explain why. interval. You have to be dedicated. The Other/Unknown category is large compared to some of the other categories (Native American, 0.6%, Pacific Islander 1.0%). , i.e. discrete because the data can only. From that number, count ten quiz scores and record that quiz score. Record the number and the first quiz score. Systematic sampling is frequently chosen because it is a simple method. Your email address will not be published. If there is a repeat press ENTER again. The road from A to E and the road from C and D are perpendicular and intersect at point F. Theresa's house is at C, 500 feet from the intersection. Press ENTER. Researchers often prefer to use quantitative data over qualitative data because it lends itself more easily to mathematical analysis. Discrete data. It may take any numeric value, within a potential value range of finite or infinite. Its really normal for you to feel anxious before your exam especially when the subject is statistics. Conduct the survey by sitting in Central Park on a bench and interviewing every person who sits next to you. State whether the data described below are discrete or? For example, a computer software store conducts a marketing study by interviewing potential customers who happen to be in the store browsing through the available software. Ordinal data is qualitative data for which their values have some kind of relative position. pair starts due east and then turns 50 toward north. Quantitative data, on the other hand, is one that contains numerical values and uses a scope. The data are discrete because the data can take on any value in an interval. OB. Compare the fractions 9/25 and 9/24. feet, and 210 sq. The results of convenience sampling may be very good in some cases and highly biased (favor certain outcomes) in others. It includes only those values which are separate and can only be counted in whole numbers or integers, which means that the data can not be split into fractions or decimals. The exact lengths (in kilometers) of the ocean coastlines of different countries. Measuring angles in radians might result in such numbers as \(\frac{\pi}{6}\), \(\frac{\pi}{3}\), \(\frac{\pi}{2}\), \(\pi\), \(\frac{3\pi}{4}\), and so on. The chart in Figure \(\PageIndex{6}\) is organized by the size of each wedge, which makes it a more visually informative graph than the unsorted, alphabetical graph in Figure \(\PageIndex{6}\). Procrastination isnt even the last option if you are preparing for a statistics exam. A defective counting device can cause a nonsampling error. Many other courses are available online to master your foundational knowledge which may assist you later. Self-selected samples: Responses only by people who choose to respond, such as call-in surveys, are often unreliable. This particular bar graph in Figure \(\PageIndex{4}\) can be difficult to understand visually. No. Confounding: When the effects of multiple factors on a response cannot be separated. Step 2: Discrete and continuous data. They spend: $50; $40; $36; $15; $50; $100; $40; $53; $22; $22. The second sample is a group of senior citizens who are, more than likely, taking courses for health and interest. You must choose 400 names for the sample. Each student is chosen using simple random sampling. O C. Statistical data needs to be critically analyzed, not simply accepted. For example, if the population is 25 people, the sample is ten, and you are sampling with replacement for any particular sample, then the chance of picking the first person is ten out of 25, and the chance of picking a different second person is nine out of 25 (you replace the first person). You should ask the doubt there and then clear it, analyze it and work on it. a. stratified; b. cluster; c. stratified; d. systematic; e. simple random; f.convenience. Now, suppose we take a third sample. Q: State whether the data below are discrete or continuous, explain why. Many of these students are taking first term calculus in addition to the organic chemistry class. It is further classified as discrete data and continuous data. answer below. A medical researcher interviews every third cancer patient from a list of cancer patients at a local hospital. The points are associated with an unbroken line. Think about what contributes to making Doreens and Jungs samples different. A bar graph is appropriate to compare the relative size of the categories. Show Less. a. stratified; b. systematic; c. simple random; d. cluster; e. convenience. If you and your friends carry backpacks with books in them to school, the numbers of books in the backpacks are discrete data and the weights of the backpacks are continuous data. A study is done to determine the average tuition that San Jose State undergraduate students pay per semester. You can go for many of the career options if you pursue stats, you can get detailed information about all of the above-mentioned choices and also many more careers on the online website of Vedantu which tells the full forms and also the detailed explanation of each one of them. The data are discrete because the data can take on any value in an interval. Manufacturers regularly run tests to determine if the amount of beverage in a 16-ounce can falls within the desired range. State whether the data described below are discrete or continuous, and explain why. Question: State whether the data described below are discrete or continuous, and explain why. Continuous data is the data that can be of any value. In this situation, create a bar graph and not a pie chart. Quick Check Introduction to Data Science. The three cans of soup, two packages of nuts, four kinds of vegetables and two desserts are quantitative discrete data because you count them. Therefore this is discrete data. You will learn why when you study confidence intervals. We might make different choices of what we think is the best graph depending on the data and the context. These data consist of audio, images, symbols, or text. Each undergraduate student in the fall semester has the same probability of being chosen at any stage of the sampling process. A high school educational researcher interviews 50 high school female teachers and 50 high school male teachers. The data are discrete because the data can . Each random number may only contribute one class member. Because it is not practical to measure the entire population in a study, researchers use samples to represent the population. Work more on basics as they form the basis for many other concepts. y's house is at D, 750 feet from the intersection. Press ENTER 2 more times (even the repeats). Whether you are a data scientist, marketer, businessman, data analyst, researcher, or you are in any other profession, you need to play or experiment with raw or structured data. In polling, samples that are from 1,200 to 1,500 observations are considered large enough and good enough if the survey is random and is well done. Cloudflare Ray ID: 7a2992ec2e151da5 26. The weights (in tons) of the trees in a forestANSWERA.) B. The following pie charts have the Other/Unknown category included (since the percentages must add to 100%). It is classified into two broad categories: qualitative data and quantitative data. Indicate whether quantitative data are continuous or discrete. A random sample is a representative group from the population chosen by using a method that gives each individual in the population an equal chance of being included in the sample. This table displays six sets of quiz scores (each quiz counts 10 points) for an elementary statistics class. Position 1 is less than the distance from G to H in Position 2. Explain your reasoning. The land areas of different countries Choose the correct answer below. Besides herself, Lisas group will consist of Marcierz, Cuningham, and Cuarismo. feet. These kinds of data can be considered in-between qualitative and quantitative data. Notice how much larger the percentage for part-time students at Foothill College is compared to De Anza College. The data are discrete because the data can only take on specific values. Points in a graph of the discrete function remain unconnected. It also could not be used if the percentages added to less than 100%. B. 8. Displaying percentages along with the numbers is often helpful, but it is particularly important when comparing sets of data that do not have the same totals, such as the total enrollments for both colleges in this example. The data are continuous because the data can only take on specific values. Notice that backpacks carrying three books can have different weights. State whether the data described below are discrete or continuous and explain why The amounts of time that different brands' batteries last in a CD player. continuous, and explain why. Asking all 20,000 listeners is an almost impossible task. Whenever you face any problem the best solution is consulting the concerned teacher, you should never hesitate to ask for doubts. Notice that the frequencies do not add up to the total number of students. Frequently Asked Questions, Pew Research Center for the People & the Press, www.people-press.org/methodolwer-your-polls (accessed May 1, 2013). What type of data is this? As a rule, the larger the sample, the smaller the sampling error. Data are individual items of information that come from a population or sample. You can specify conditions of storing and accessing cookies in your browser. The students spend the following amounts: $180; $50; $150; $85; $260; $75; $180; $200; $200; $150. Finite values have discrete data. Just as there is variation in data, there is variation in samples. a. Create a cluster sample by picking two of the columns. Besides simple random sampling, there are other forms of sampling that involve a chance process for getting the sample. The time(in minutes) it takes The time(in minutes) it takes A: It is given that the time (in minutes) it takes different students to drive to school from home. Number of bacteria in a petri dish is 12,120. The bar graph is used to graphically represent discrete data. Non-response or refusal of subject to participate: The collected responses may no longer be representative of the population. If you count the number of phone calls you receive for each day of the week, you might get values such as zero, one, two, or three. Learn data analytics or software development & get guaranteed* placement opportunities. A stated earlier, Lengths are in general, continuous variables. 13. 24 people said theyd prefer more talk shows, and 176 people said theyd prefer more music. Question: CS State whether the data described below are discrete or continuous, and explain why. The data will be quantitative, say 2+3 (=5) apples. Indicate whether quantitative data are continuous or discrete. O A. The quiz scores (20 of them) in these 2 columns are the cluster sample. Discrete data is a sort of numerical data that consists of full, concrete numbers that have particular and fixed data values that are determined by counting. Your answer is correct. It is countable. Other well-known random sampling methods are the stratified sample, the cluster sample, and the systematic sample. For example, 16-ounce cans of beverage may contain more or less than 16 ounces of liquid. On the other hand, if we count large quantities of any discrete entity. The data are discrete because the data can only take on specific values. A pie chart cannot be used. The durations of a chemical reaction comma repeated . A. Data that can take a decimal value and can vary across a range is called . B. The term discrete means distinct or separate. For column 1, Press 5:randInt( and enter 1,10). All data that are the result of counting are called quantitative discrete data. You can email the site owner to let them know you were blocked. But graphs can be even more helpful in understanding the data. Discrete. B. The sample probably doesnt represent the entire fan base and is probably biased towards people who would prefer music. answer below. . One student has a red backpack, two students have black backpacks, one student has a green backpack, and one student has a gray backpack. What is the main difference between discrete and continuous data? You'll get a detailed solution from a subject matter expert that helps you learn core concepts. Data may come from a population or from a sample. The discrete data are countable and have finite values; their subdivision is not possible. Lisa reads two-digit groups until she has chosen three class members (that is, she reads 0.94360 as the groups 94, 43, 36, 60). Create a simple random sample of 15 quiz scores. The numbers of hotels in cities Choose the correct answer below. The data are because.continuous the data can only take on specific values C. Do you think that either of these samples is representative of (or is characteristic of) the entire 10,000 part-time student population? Quantitative data are the result of counting or measuring attributes of a population. The data are continuous because the data can take on any value in an interval. You can get study material, solved and unsolved questions, and also quizzes which will help you test your knowledge. Step One: Master the Foundational Knowledge. Keep counting ten quiz scores and recording the quiz score until you have a sample of 12 quiz scores. Continuous data represents information that can be divided into smaller levels. We are interested in the average amount of money a part-time student spends on books in the fall term. For qualitative data, if the list can be sorted naturally, we further specify it as an ordinal variable. 5. Any group of n individuals is equally likely to be chosen by any other group of n individuals if the simple random sampling technique is used. Sample size issues: Samples that are too small may be unreliable. Still, continuous data stores the fractional numbers to record different types of data such as temperature, height, width, time, speed, etc. State whether each situation is categorical or quantitative. 2013 - 2023 Great Lakes E-Learning Services Pvt. An administrative assistant is asked to stand in front of the library one Wednesday and to ask the first 100 undergraduate students he encounters what they paid for tuition the Fall semester. The duration of movies in minutes A.The data are continuous because the data can take on any value in an interval. Suppose we take two different samples. The numbers of hotels in cities Choose the correct answer below. There are several different methods of random sampling. Collecting data carelessly can have devastating results. . CS State whether the data described below are discrete or continuous, and explain why. according to measurement accuracy, it can be significantly subdivided into smaller sections. The data are discrete because the data can only take on specific values. All members of the four departments with those numbers are the cluster sample. Surveys are typically done without replacement. LBCC Distance Learning (DL) program data in 2010-2011. lastbaldeagle. Additional Resources Self-funded or self-interest studies: A study performed by a person or organization in order to support their claim. Variation is present in any set of data. The number of classes a student missed. The measure of ZQ is 10 less than the measure of LP. Quantitative data, on the other hand, is one that contains numerical values and uses a scope. Then use simple random sampling to choose proportionate numbers from the first department and do the same for each of the remaining departments. To determine the average cost of a two-day stay in a hospital in Massachusetts, survey 100 hospitals across the state using simple random sampling. The class boundaries are 10 to less than 13, 13 to less than 16, 16 to less than 19, 19 to less than 22, and 22 to less than 25. The two numbers are for two of the columns. Ordinal data have natural ordering where a number is present in some kind of order by their position on the scale. Each travels 2 miles, then changes direction and travels 1.2 miles. Discrete is data that can take only certain values. Over time, some continuous data can change. To choose a cluster sample, divide the population into clusters (groups) and then randomly select some of the clusters. For example, you could stratify (group) your college population by department and then choose a proportionate simple random sample from each stratum (each department) to get a stratified random sample. You sample five houses. Measurement of height and weight of a student, Daily temperature measurement of a place, Wind speed measured daily, etc.
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