An analyst in a government ministry is interested in the average cost of textbooks per semester for a college student. A previous estimate suggests that the average cost of textbooks per semester is $700. The analyst conducts a random sample of 75 college students, with a sample average cost of $756 and a standard deviation of $132.Is there evidence that average text book costs per semester have increased for college students? You have already examined this problem, in Chapter 6 Review Exercise 7.Complete a formal hypothesis test, with a 5% level of significance.
Answer to relevant QuestionsA financial services company conducted a survey of a random sample of its customers. One of the items on the survey was as follows: "The staff at my local branch can provide me with good advice on my financial affairs." ...Lynda Parks has surveyed a random sample of the customers who shop at the drugstore she owns. Is there evidence that the average purchase amount is more than $25? Use a 5% level of significance. A college surveys incoming students every year. An excerpt of one such survey, for Business students only, is available in MyStatLab. For this question, consider these particular incoming students as a random sample of all ...A company is trying to decide whether to provide an outdoor gazebo for the smokers on its staff. Before any money is spent on construction costs, the company would like to estimate the percentage of its workers who smoke. A ...The manager of a college coffee shop believes that members of the college community spend an average of about $6 a week on morning coffees. You conduct a random sample of the college community, and find that the data on ...
Post your question