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Title: Generally, the normal probability plot for a data set must be roughly linear in order to assume that ... Post by: mananshah90 on Mar 3, 2018 Generally, the normal probability plot for a data set must be roughly linear in order to assume that the variable is approximately normally distributed.
Should this rule be interpreted more strictly for small data sets or for large data sets? Explain. Q. 2 A poll investigating the level of public support for proposed gun control legislation reported that 66 of the respondents were in favor. The pollsters reported a sampling error of 2. When the responses were broken down by gender, support was 3 higher among women than men. The pollsters said the margin of error for this difference was 3. Why is the margin of error larger for the difference in support between the genders than for the overall level of support? Q. 3 According to government data, the probability than an adult never had the flu is 19. You randomly select 70 adults and ask if he or she ever had the flu. Decide whether you can use the normal distribution to approximate the binomial distribution, If so, find the mean and standard deviation, If not, explain why. Round to the nearest hundredth when necessary. Q. 4 What is a designed experiment? What will be an ideal response? Q. 5 A researcher wants to obtain a confidence interval for the difference between the proportions of women and men who approve of the mayor's performance. Obtain a common sample size that will ensure a margin of error of at most 0. 05 for a 95 confidence interval, if you can reasonably presume that at most 47 of men and between 55 and 60 of women approve of the mayor's performance. A) 769 B) 764 C) 753 D) 752 Q. 6 Suppose that scores on a test are normally distributed with a mean of 80 and a standard deviation of 8. You have been asked to find the 70th percentile. After sketching a standard normal curve and shading the area of interest, the next step in solving this problem is to use the table of areas. Would you look for 0.7 in the body of the table or in the left-hand column? Explain your reasoning. Q. 7 Multiple choice questions on a test that include as one of the choices none of the above are an example of what type of question? A) open question B) reader response question C) closed question D) framing question Title: Generally, the normal probability plot for a data set must be roughly linear in order to assume that ... Post by: Maalmb on Mar 3, 2018 Content hidden
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