For Questions , Use the Following Narrative

question 14

Essay

For Questions , use the following narrative
Narrative: Cell phone use
How do men and women compare when it comes to talking on the cell phone? Suppose you take a random sample of 100 male cell phone owners and a random sample of 100 female cell phone owners.The average number of minutes for the women per month was 280 with a standard deviation of 10; the average number of minutes for the men per month was 190 with a standard deviation of 30.
-{Cell phone use narrative} Suppose the women had only talked for 195 minutes per month, on average, and all the other statistics remained the same.Find the lower and upper limits for the resulting confidence interval (females - males), and interpret the results.Who's talking now?

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Definitions:

Days' Sales

A financial metric that measures the average number of days it takes a company to convert its inventory into sales.