Question

A watch manufacturer believes that 60% of men over age 50 wear watches. So, the manufacturer took a simple random sample of 275 men over age 50 and 170 of those men wore watches. Test the watch manufacturer's claim at α = .05. (a) State the null and alternative hypothesis in symbolic form. (b) Find the test statistic (preferably obtained using technology). Sketch a graph of the normal distribution clearly showing the test statistic (rounded to two decimal places) and the critical region, α=.05. (c) Decide and explain your choice to reject the null or fail to reject the null. (d) Write a summary statement addressing the original claim

Answer 1

A watch manufacturer believes that 60% of men over the age of 50 wear watches. So, the manufacturer took a simple random sample of 275 men over the age of 50, and 170 of those men wore watches. Test the watch manufacturer's claim at α = 0.5 using PHANTOMS.