1- In a study of government financial aid for collegestudents, it becomes necessary to estimate the percentage offull-time college students who earn abachelor's degree in four years or less. Find the sample size needed to estimate that percentage. Use a 0.01 margin of error and use a confidence level of 90%. Complete parts(a) through(c) below.

2- You are the operations manager for an airline and you are considering a higher fare level for passengers in aisle seats. How many randomly selected air passengers must yousurvey? Assume that you want to be 99% confident that the sample percentage is within 3.5 percentage points of the true population percentage. Complete parts(a) and(b) below

3- In a survey of 3222 adults aged 57 through 85years, it was found that 86.2% of them used at least one prescription medication. Complete parts(a) through(c) below.

4- A genetic experiment with peas resulted in one sample of offspring that consisted of 416 green peas and 163 yellow peas.

a. Construct a 95% confidence interval to estimate of the percentage of yellow peas.

b. It was expected that25% of the offspring peas would be yellow. Given that the percentage of offspring yellow peas is not25%, do the results contradictexpectations?

5- A clinical trial tests a method designed to increase the probability of conceiving a girl. In the study 370 babies wereborn, and 333 of them were girls. Use the sample data to construct a 99% confidence interval estimate of the percentage of girls born. Based on theresult, does the method appear to beeffective?

6- Use the sample data and confidence level given below to complete parts(a) through(d).

A drug is used to help prevent blood clots in certain patients. In clinicaltrials, among 4662 patients treated with thedrug, 181 developed the adverse reaction of nausea. Construct a 90% confidence interval for the proportion of adverse reactions.