A high school educational researcher interviews 50 high school female teachers and 50 high school male teachers. 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. 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 students spend the following amounts: $180; $50; $150; $85; $260; $75; $180; $200; $200; $150. Press 5:randInt( and enter 1,6). Non-response or refusal of subject to participate: The collected responses may no longer be representative of the population. Do not automatically assume that the study is good, but do not automatically assume the study is bad either. State whether the data described below are discrete or continuous, and explain why. Show how you know. The numbers of majors offered by colleges Choose the correct answer below. When a sampling bias happens, there can be incorrect conclusions drawn about the population that is being studied. The weights (in tons) of the trees in a forestANSWERA.) 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. On your calculator, press Math and arrow over to PRB. Data that can only take on certain values are discrete data. Nominal Data is used to label variables without any order or quantitative value. If they are not, discuss the reasons. (2012), D is the discrete character data, z is a particular character mapping, and are the parameters of the hOUwie model. The result of the rolling is a dice is 1, 2, 3, 4, 5, 6, 7, and 8. You have to be dedicated. classes and taking every fifth senior citizen on the list, for a total of ten senior citizens. All members of the four departments with those numbers are the cluster sample. amount of money (in dollars) won playing poker, IQ scores (This may cause some discussion.). . Quantitative data, on the other hand, is one that contains numerical values and uses a scope. 2. D. The (We assume that these are the only disciplines in which part-time students at ABC College are enrolled and that an equal number of part-time students are enrolled in each of the disciplines.) Discrete data is data that can only take certain values, while data that can take any value is continuous data. Your phone book contains 20,000 residence listings. We provide you year-long structured coaching classes for CBSE and ICSE Board & JEE and NEET entrance exam preparation at affordable tuition fees, with an exclusive session for clearing doubts, ensuring that neither you nor the topics remain unattended. B. Suppose we take two different samples. The numbers of hotels in cities Choose the correct answer below. Notice how much larger the percentage for part-time students at Foothill College is compared to De Anza College. The land areas of different countries Choose the correct answer below. Experts are tested by Chegg as specialists in their subject area. For any particular sample of 1,000, if you are sampling with replacement. But still, their samples would be, in all likelihood, different from each other. Suppose Doreen and Jung both decide to study the average amount of time students at their college sleep each night. Doreen's sample will be different from Jung's sample. It can be the version of an android phone, the height of a person, the length of an object, etc. The number of animals in a zoo is continuous data because the number of animals varies yearly depending on the reproduction of new animals or the arrival of new animals. Divide your college faculty by department. Press ENTER. Record the number and the first quiz score. O A. The data are continuous because the data can only take on specific values. Create a stratified sample by column. It only contains finite values, the subdivision of which is not possible. Therefore this is discrete data. feet, 190 sq. It only contains finite values, the subdivision of which is not possible. the chance of picking the first person for any particular sample is 1000 out of 10,000 (0.1000); the chance of picking a different second person is 999 out of 9,999 (0.0999); you do not replace the first person before picking the next person. The option "B" is correct i.e. Each method has pros and cons. B. Confounding makes it difficult or impossible to draw valid conclusions about the effect of each factor. O C. The data are continuous because the data can take on any value in an interval. The quiz scores (20 of them) in these 2 columns are the cluster sample. PGP in Data Science and Business Analytics, PGP in Data Science and Engineering (Data Science Specialization), M.Tech in Data Science and Machine Learning, PGP Artificial Intelligence for leaders, PGP in Artificial Intelligence and Machine Learning, MIT- Data Science and Machine Learning Program, Master of Business Administration- Shiva Nadar University, Executive Master of Business Administration PES University, Advanced Certification in Cloud Computing, Advanced Certificate Program in Full Stack Software Development, PGP in in Software Engineering for Data Science, Advanced Certification in Software Engineering, PG Diploma in Artificial Intelligence IIIT-Delhi, PGP in Software Development and Engineering, PGP in in Product Management and Analytics, NUS Business School : Digital Transformation, Design Thinking : From Insights to Viability, Master of Business Administration Degree Program, 4 Types Of Data Nominal, Ordinal, Discrete and Continuous. The data are discrete because the data can only take on specific values. Data that can take a decimal value and can vary across a range is called . answer below. 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 \(\PageIndex{6}\). Be aware that as you take data, your data may vary somewhat from the data someone else is taking for the same purpose. ), Marital status (Single, Widowed, Married), When companies ask for feedback, experience, or satisfaction on a scale of 1 to 10, Letter grades in the exam (A, B, C, D, etc. The size of a sample (often called the number of observations) is important. When properly selected, larger samples model the population more closely than smaller samples. The table displays Ethnicity of Students but is missing the "Other/Unknown" category. You sample five students. Difference Between Continuous and Discrete Data, Questions on Discrete Data Continuous Data. Press ENTER. State whether the data described below are discrete or? B. For the purpose of analysis, data are presented as the facts and figures collected together. Statistical data about spreading of the epidemic are known in discrete periods of time, for example twenty-four hours. Your answer is correct. O A. Instructions: Use the Random Number Generator to pick samples. To choose a cluster sample, divide the population into clusters (groups) and then randomly select some of the clusters. If these data-driven topics got you interested in pursuing professional courses or a career in the field of Data Science. Our choice also depends on what we are using the data for. 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. A study is done to determine the average tuition that San Jose State undergraduate students pay per semester. The data are discrete because the data can take on any value in an interval. Working on data is crucial because we need to figure out what kind of data it is and how to use it to get valuable output out of it. B. That is, a member of the population may be chosen only once. What type of data is this? Now, suppose we take a third sample. Another example is learning how to use calculators. Problems with samples: A sample must be representative of the population. Nominal Data is used to label variables without any order or quantitative value. A stated earlier, Lengths are in general, continuous variables. However, if two or more of you are taking the same data and get very different results, it is time for you and the others to reevaluate your data-taking methods and your accuracy. To choose a simple random sample from each department, number each member of the first department, number each member of the second department, and do the same for the remaining departments. Great Learning's Blog covers the latest developments and innovations in technology that can be leveraged to build rewarding careers. The duration of movies in minutes A.The data are continuous because the data can take on any value in an interval. Frequently Asked Questions, Pew Research Center for the People & the Press, www.people-press.org/methodolwer-your-polls (accessed May 1, 2013). Click to reveal The exact lengths (in kilometers) of the ocean coastlines of different countries is a continuous variable because it can take on any value in an interval. Continuous data represents information that can be divided into smaller levels. Data may be classified as qualitative, quantitative continuous, or quantitative discrete. The data are discrete because the data can only take on specific values. 13. This pie chart shows the students in each year, which is qualitative data. Number each department, and then choose four different numbers using simple random sampling. Create a systematic sample of 12 quiz scores. Then choose every fiftieth name thereafter until you have a total of 400 names (you might have to go back to the beginning of your phone list). the number of classes you take per school year. Quantitative data can be used for statistical manipulation. The number of books in a rack is a finite countable number. This data is so important for us that it becomes important to handle and store it properly, without any error. All data that are the result of counting are called quantitative discrete data. They spend: $50; $40; $36; $15; $50; $100; $40; $53; $22; $22. Also, in both cases, not all students have a chance to be in either sample. Record these numbers. Question: State whether the data described below are discrete or continuous, and explain why. 10. Save my name, email, and website in this browser for the next time I comment. Each random number may only contribute one class member. Otherwise, the variable is nominal. 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. B. B.The data are discrete because the data can only take on specific values. Qualitative data are generally described by words or letters. Discrete is data that can take only certain values. A bar graph is appropriate to compare the relative size of the categories. True random sampling is done with replacement. Discrete. Tips and Tricks to study Discrete and Continuous Data, Age is discrete data because we could be infinitely precise and use an infinite number of decimal places, rendering age continuous as a result. 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. It is from a continuousdata set because 218+ Consultants 4.7 Satisfaction rate There are distinct or different values in discrete data. Try to identify additional data sets in this example. C. The data are Quantitative data are the result of counting or measuring attributes of a population. the number of data values is increased), their sample results (the average amount of time a student sleeps) might be closer to the actual population average. To four decimal places, these numbers are equivalent (0.0999). O A. For qualitative data, if the list can be sorted naturally, we further specify it as an ordinal variable. 2003-2023 Chegg Inc. All rights reserved. As a class, determine whether or not the following samples are representative. Discrete Data Examples: The number of students in a class, the number of chocolates in a bag, the number of strings on the guitar, the number of fishes in the aquarium, etc. These data are represented mainly by a bar graph, number line, or frequency table. They both did. The following graph is the same as the previous graph but the Other/Unknown percent (9.6%) has been included. Hint: Data that are discrete often start with the words "the number of.". The second sample is a group of senior citizens who are, more than likely, taking courses for health and interest. Types of soups, nuts, vegetables and desserts are qualitative data because they are categorical. If you sample without replacement, then the chance of picking the first person is ten out of 25, and then the chance of picking the second person (who is different) is nine out of 24 (you do not replace the first person).

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