According to the University of Nevada Center for Logistics Management, 9% of all merchandise sold in the United States gets returned. A Houston department store sampled 100 items sold in January and found that 12 of the items were returned. a. Construct a point estimate of the proportion of items returned for the population of sales transactions at the Houston store. (to 4 decimals) b. Construct a 98% confidence interval for the proportion of returns at the Houston store. ) (to 4 decimals) c.Is the proportion of returns at the Houston store significantly different from the returns for the nation as a whole? Provide statistical support for your answer. Since the confidence interval -Select your answer - v 0.09. we condude that the return rate for the Houston store -Select your answer - V the U.S. national return rate.

You want to estimate the average difference in the number of complaints filed by women at work and the number of complaints filed by men at work.  You took an SRS of 7 businesses and collected the following data for number of complaints in a year: men 1 3 2 4 6 3 5 women 8 7 6 3 5 12 15   Create a 90% confidence interval for the average difference in the number of complaints filed by women at work and the number of complaints filed by men at work (in a year).  You must do this using table C.  If this is a 2 sample interval, be sure to specify who is population 1 and who is population 2.  If this is a matched pairs interval, be sure to state the order you subtracted your data.  Once you create your interval, give a sentence explaining the meaning of the interval (what the numbers in the interval mean, NOT the meaning of 95%) in context of this problem.  Round to any appropriate number of decimals.

When 258 college students are randomly selected and surveyed, it is found that 106 own a car. Find a 99% confidence interval for the true proportion of all college students who own a car.

We randomly sample 218 individuals and find that 97 have a college degree. a.)Construct a 95% confidence interval. b.) Describe our interpretation of the confidence level.

Please answer a, b, and d

Twenty-two car salespeople were sampled to see how many cars they sold in a month; the following data was obtained: 26, 20, 22, 18, 21, 14, 24, 28, 17, 23, 28, 29, 18, 17, 24, 26, 19, 27, 26, 22, 23, 25 Construct a 95% confidence interval for the mean number of cars sold per month by the population of car salespeople. S = t = Margine of Error: E = We are 95% confident that, on average, car salespeople sell between cars and cars per month.