A large population has . Suppose a simple random sample of 4…

A large population has . Suppose a simple random sample of 49 items was taken and a sample mean of 133 was obtained.   A.) Find the value for given a 92% confidence level. [a] Retype your answer. [b] B.) Find the margin of error, E, for a 92% confidence level. [c] Retype your answer. [d] C.) Find a 92% confidence interval for the population mean. ( [e] , [f] ) D.) Would the confidence interval become wider (W), narrower (N), or stay the same (S) if we were to… i.) increase the level of confidence? [g] ii.) increase the sample size? [h]

Use this set-up for Problems 60-61: Consider the breakdown…

Use this set-up for Problems 60-61: Consider the breakdown of the 3,839 freshman students admitted to UMSL during Fall 2020, as shown in the table below:   Traditional Applicants Transfer Students Total Enrolled in classes 408 1027 1435 Did not enroll in classes 1688 716 2404 Total 2096 1743 3839   What is the probability that one admitted student, chosen at random, would be a traditional applicant who chose to not enroll in classes?

Use this set-up for Problems 53-56:   A Quinnipiac poll perf…

Use this set-up for Problems 53-56:   A Quinnipiac poll performed on January 28-February 1, 2021 asked Americans, “Are you willing to get a COVID-19 vaccine, or not?” 30% of respondents said they were not. You wonder whether this proportion has changed in the past few months, so you conduct a poll of 100 Americans and ask the same question. 25 people in your sample were unwilling to get the COVID-19 vaccine. Suppose you set .   What hypotheses should you set-up to determine if the percentage has changed since the initial poll?