Illustrative Example:Grade 10 learners: 1, 000 learners (population)Random sample: 100 learnerssample100ороpulation1,000Activity 1. Identify whether the following refer to population or sample:_1. The total number of students in a school._2. A group of 30 patients in a hospital undergoing treatment for COVID._3. The ages of all vendors in a public market._4. The top 50 top-earning Filipinos._5. The list of all countries in the world.Activity 2. Consider sampling the 300 students, in a different way, to obtain a sample of 150 stu-dents. Alongside eachname, the numbers 1 and 2 are listed alternately (1, 2, 1,2, .. .). A fair coin is tossed. If the outcome is heads, the sample istaken to be the 150 students with a 'l° next to their name. If the outcome is tails, the sample is the 150 students with a '2'next to their name.a. Using this method, how many possible samples of 150 can be obtained?b. Does every student have the same chance of selection?c. Is this a simple random sample?

"Since you have asked multiple questions, we will solve the first question for you. If you want any…

Answered: Activity 1. Identify whether the…

Holt Mcdougal Larson Pre-algebra: Student Edition 2012

1st Edition

ISBN:9780547587776

Author:HOLT MCDOUGAL

Publisher:HOLT MCDOUGAL

Chapter11: Data Analysis And Probability

Section11.4: Collecting Data

Problem 2E

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Alcohol abuse has been described by college presidents as the number one problem on campus, and it is an important cause of death in young adults. How common is it? A survey of 10,904 randomly selected U.S. college students collected information on drinking behavior and alcohol-related problems. The researchers defined “frequent binge drinking” as having five or more drinks in a row three or more times in the past two weeks. According to this definition, 2486 students were classified as frequent binge drinkers. Construct and interpret a 99% confidence interval for the proportion of students who are classified as binge drinkers. (Use the four-step process.) What would you include in "State" from the 4-step process?
Alcohol abuse has been described by college presidents as the number one problem on campus, and it is an important cause of death in young adults. How common is it? A survey of 10,904 randomly selected U.S. college students collected information on drinking behavior and alcohol-related problems. The researchers defined “frequent binge drinking” as having five or more drinks in a row three or more times in the past two weeks. According to this definition, 2486 students were classified as frequent binge drinkers. Construct and interpret a 99% confidence interval for the proportion of students who are classified as binge drinkers. (Use the four-step process.) In the normal condition, np is 8,418, which is greater than 10 so the normal condition is met. Is this statement true or false?
Alcohol abuse has been described by college presidents as the number one problem on campus, and it is an important cause of death in young adults. How common is it? A survey of 10,904 randomly selected U.S. college students collected information on drinking behavior and alcohol-related problems. The researchers defined “frequent binge drinking” as having five or more drinks in a row three or more times in the past two weeks. According to this definition, 2486 students were classified as frequent binge drinkers. Construct and interpret a 99% confidence interval for the proportion of students who are classified as binge drinkers. (Use the four-step process and Table A to get your z* value.) Using the interval that you calculated in the last question, conclude in context for the question.
Suppose you are asked to sample 100 students at the University to get their opinions about a requirement that all students get Covid-19 vaccine before resuming inperson classes in the Fall 2021.a) Describe how you could go about getting a stratified sample. b) Describe how you could go about getting a voluntary response sample
A nationwide Salmonella outbreak is being investigated. Confirmed cases of salmonella are being reported from all states. The suspected source of the salmonella is cantaloupe. Investigators decided to randomly select 200 cases and 200 controls from one state to investigate the association between salmonella and consumption of cantaloupe. Among the cases with salmonella infection, 148 said that they recently ate cantaloupe. Among the healthy controls, 32 gave a history of recent cantaloupe consumption. Develop the 2x2 table. Calculate and interpret the odds ratio. What type of study is this?
Researchers report that university students who are on Twitter or have it running in the background) while studying had lower grades than students who did not use the social network. A researcher would like to know if the same result extends to students in lower grade levels. The researcher planned a two-factor study comparing Twitter users with non-users for primary school students, high school students, and university students. For consistency across groups, grades were converted into six categories, numbered 0–5 from low to high. The results are presented in the following matrix. Use a two factor ANOVA with α =.05 to evaluate the mean differences and answer the following questions:Q.5.1.What are the dependent and independent variables in this study?Q.5.2.State the alternate hypotheses for this test.Q.5.3.What were the assumptions for this statistical test and were they met? Q.5.4.Does using twitter have an influence on student’s grades across all ages? Were there any significant…
Alcohol abuse has been described by college presidents as the number one problem on campus, and it is an important cause of death in young adults. How common is it? A survey of 119 randomly selected U.S. college students collected information on drinking behavior and alcohol-related problems. The researchers defined “frequent binge drinking” as having five or more drinks in a row three or more times in the past two weeks. According to this definition, 41 students were classified as frequent binge drinkers. Use the data to construct and interpret a 98% confidence interval for the percentage of students who are “frequent binge drinking”. Procedure: Assumptions: (select everything that applies) Population standard deviation is unknown Population standard deviation is known Sample size is greater than 30 Normal population The number of positive and negative responses are both greater than 10 Simple random sample Unknown parameter:
A pet food manufacturer runs an experiment to determine whether four types of cat treats are equallypreferred by cats. The manufacturer randomly selects 160 cats from a large city’s network of animal shelters.In the experiment, 160 cats are individually presented with four dishes, each containing a different type oftreat, and their choices are noted. Results show that 30 cats chose Type A, 43 chose Type B, 45 chose Type C,and 42 chose Type D. Do these data provide convincing statistical evidence at the 10% level that cats have preferences among typesof cat treats?
A research is presented. For each, identify the (A) population and (B) sample in the study 3. Researchers want to determine whether or not higher folate intake is associated with a lower risk of hypertension (high blood pressure) in women (927 to 44 years of age). To make this determination, they look at 7373 cases of hypertension in these women and find that those consume at least 1000 micrograms per day of total folate had a decreased risk of hypertension compared with those who consume less than 200 A: B:
A group of 50 computer science students were taught introductory computer programming class with an innovative teaching method that used a graphical interface and drag-and-drop methods of creating computer programs. At the end of the class, 43 of these students said that they felt confident in their ability to write computer programs. Another group of 40 students were taught the same material using a standard method. At the end of class, 25 of these students said they felt confident. Assume that each class contained a simple random sample of students. Find a 99% confidence interval for the difference between the proportions of students who felt confident.

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