# Question: A study claims that all adults spend an average of

A study claims that all adults spend an average of 14 hours or more on chores during a weekend. A researcher wanted to check if this claim is true. A random sample of 200 adults taken by this researcher showed that these adults spend an average of 14.65 hours on chores during a weekend. The population standard deviation is known to be 3.0 hours.

a. Find the p-value for the hypothesis test with the alternative hypothesis that all adults spend more than 14 hours on chores during a weekend. Will you reject the null hypothesis at α = .01?

b. Test the hypothesis of part a using the critical-value approach and α = .01.

a. Find the p-value for the hypothesis test with the alternative hypothesis that all adults spend more than 14 hours on chores during a weekend. Will you reject the null hypothesis at α = .01?

b. Test the hypothesis of part a using the critical-value approach and α = .01.

**View Solution:**## Answer to relevant Questions

According to the U.S. Bureau of Labor Statistics, all workers in America who had a bachelor’s degree and were employed earned an average of $1038 a week in 2010. A recent sample of 400 American workers who have a ...At Farmer’s Dairy, a machine is set to fill 32-ounce milk cartons. However, this machine does not put exactly 32 ounces of milk into each carton; the amount varies slightly from carton to carton but has a normal ...For each of the following examples of tests of hypothesis about , show the rejection and non rejection regions on the t distribution curve. a. A two-tailed test with α = .02 and n = 20 b. A left-tailed test with α = .01 ...Consider H0: µ = 40 versus H1: µ > 40. a. A random sample of 64 observations taken from this population produced a sample mean of 43 and a standard deviation of 5. Using α = .025, would you reject the null hypothesis? b. ...A paint manufacturing company claims that the mean drying time for its paints is not longer than 45 minutes. A random sample of 20 gallons of paints selected from the production line of this company showed that the mean ...Post your question