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Students in an online Statistics course reported the following hours spent weekly on the course.8.5 4.5 12.5 13 14 3.5 6.5 18 21.5 23.5Assume the number of hours spent by all students follows a normal...

1. When 50 people used the 5-2 fast diet for one year, their mean weight loss was 5 pounds and the standard deviation was 4 pounds. Use a .05 significance level to test the claim that their average...

In a poll of 212 prison wardens, 98 said that tattoos are a sign of trouble. Find the sample proportion who think tattoos are a sign of trouble. Using the problem above, to test the...

In sampling 25 college graduates on how many times they cheated during their college years, you calculated a mean of 4.8 and a standard deviation of 4.2. Find a 98% confidence interval for the mean...

Students in a college class were asked to time how long it takes them in minutes to get ready in the morning. Here were the responses: 14, 28, 5, 12, 56, 32, 2, 17Construct a 90% confidence interval...

If you want to find the percentage of people who are left-handed, how many people must we survey in order to be 99% confident that we are within 3 percentage points of the population percentage? Assume...

In a Gallop poll of 567 randomly selected adults, 274 said they were underpaid. Construct a 95% confidence interval estimate for the percentage of all adults who said they were underpaid.

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