None of the answers are correct. QUESTION 9 3.64 (3.76) Just before a presidential election a national opinion polling firm increases the size of its weekly sample. Why? To reduce the variability of the sampling distribution for its statistics. To reduce bias of its statistics. QUESTION 10 3.68 (3.86) Label each distriubtion relative to the others as high or low bias and as high or low variability. 1. a: High Bias, High Variability; b: Low Bias, Low Variability c: High Bias, Low Variability; d: High Bias, Low Variability 2. a: Low Bias, Low Variability; b: High Bias, High Variability c: Low Bias, High Variability; d: High Bias, Low Variability 3. a: High Bias, High Variability; b: Low Bias, Low Variability c: Low Bias, High Variability; d: High Bias, Low Variability QUESTION 11 3.70 (3.88) (a) The Internal Revenue Service plans to examine an SRS of individual returns from each state. One variable of interest is the proportion of returns claiming itemized deductions. The total number of tax returns in a state varies from 14 million in CA to 227,000 in Wyoming. Will the variability of the sample proportion vary from state to state if an SRS of 2000 is taken in every state? Yes because the percent of all returns will vary from state to state. Yes because the percent of returns is more than 1% for the smallest state. No because the number of returns sampled is constant and the percent of total returns is less than 1% for all states. QUESTION 12 3.70 (3.88) (b) Will the variability of the sample proportion change from state to state if an SRS of 1/10 of 1% of the state's population is taken from each state? No because the percent is the same in each state. Yes because the percent of returns sampled is greater than 1% for some states. Yes because the number of returns varies from state to state. Click Save and Submit to save and submit. Click Save All Answers to save all answers. Save All A* Question Completion Status: QUESTION 1 3.1 (3.1) A market researcher interviews a large sample of consumers, both men and women. She asks each consumer which of two health plans he or she prefers. Is this study an experiment? Why or why not? This is an experiment because we are asking people for their opinion. This is not an experiment because we are only asking people for an opinion that they already have. This is an experiment becasue the men and women are separated. This is an experiment because some of the people are given a drug and others a placebo. QUESTION 2 3.1 (3.1) Which is the explanatory and which the response variable? Gender is the explanatory; Health plan is the response. Health plan is the explanatory; Gender is the response. Gender is the explanatory; Gender is the response. QUESTION 3 3.14 (3.14) Which of the two questions received 40% favorable and which 80% and why. Question A (Question 1 in the 2nd edition of the textbook) got 40% agreement and Question B (Question 2) got 80% agreement due to the use of phrases like 'huge sums of money' in the second question. Question A (Question 1 in the 2nd edition of the textbook) got 80% agreement and Question B got 40% agreement due to the use of phrases like 'special interests' in the first question. QUESTION 4 3.18 (3.24) (a) Give an example of a way to choose a sample of students that is poor practice because it depends on voluntary response. Ask your friends to participate in the study. Hang a sign that asks people to call a number to participate in a study about parking on campus. All the answers are correct. QUESTION 5 3.18 (3.24) (b) Give an example of a way to choose a sample of students that does NOT rely on voluntary response. sk your friends to participate in the study.OR uic.blackboard.com e Tutors - Course Hero Blackboard Learn C | Chegg.com Bb Content Question Completion Status: QUESTION 5 5 points 3.18 (3.24) (b) Give an example of a way to choose a sample of students that does NOT rely on voluntary response. Ask your friends to participate in the study. Hang a sign that asks people to call a number to participate in a study about parking on campus. Both answers are correct. QUESTION 6 4 points Sav 3.31 (3.37) What are the individuals and the response variable in this experiment. The individuals are the yeild and the response variable is the chemcial batches The individuals are the chemical batches and the response variable is the yield. The individuals are the three stirring rates and the response variable is the temperature. The individuals are the temperatures and the response variable is the three stirring rates . QUESTION 7 4 points Save 3.31 (3.37) How many factors are there? How many treatments? There is one factor, the yield. There are two factors (temperature and stirring rate). Temperature has two levels and stirring rate has 3 levels so there are 5 treatments. There are two factors (temperature and stirring rate). Temperature has two levels and stirring rate has 3 levels so there are 6 treatments. There are two factors, the chemical batches and the yield. Therefore there are 2 treatments. QUESTION 8 2 points Save 3.31 (3.37) (c) How many individuals are required for the experiment? 6 05 O 12 None of the answers are correct. QUESTION 9 10 points Save Ans 3.64 (3.76) Just before a presidential election a national opinion polling firm increases the size of its weekly sample. Why? To reduce the variability of the sampling distribution for its statistics. To reduce bias of its statistics. Save and Sub