# Question

Repeat Exercise 11 assuming that the population standard deviation s is known to be 11.1 years.

Conduct the hypothesis test using a known value of the population standard deviation σ.

Conduct the hypothesis test using a known value of the population standard deviation σ.

## Answer to relevant Questions

Repeat Exercise 12 assuming that the population standard deviation s is known to be 1.065 lb. Conduct the hypothesis test using a known value of the population standard deviation σ. Assume that we want to use the sample data from Exercise 1 to test the claim that the sample is from a population with a standard deviation less than 1.8 min; we will use a 0.05 significance level to test that claim. If we ...In an analysis investigating the usefulness of pennies, the cents portions of 100 randomly selected credit card charges from the author are recorded, and they have a mean of 47.6 cents and a standard deviation of 33.5 cents. ...Repeat Exercise 19 using this approximation (with k and z as described in Exercise 19): Assume that we want to use the same sample data from Exercise 7 to test the claim that the standard deviation of all drawn numbers is less than 15.0. Why can’t we use a x2 test with the methods described in Section 8-4?Post your question

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