# Question

Suppose that a national survey finds that 73 percent of restaurant employees say that work stress has a negative impact on their personal lives. A random sample of 200 employees of a large restaurant chain finds that 141 employees say that work stress has a negative impact on their personal lives.

(1) Formulate the null and alternative hypotheses needed to attempt to provide evidence that the percentage of work-stressed employees for the restaurant chain differs from the national percentage.

(2) Use critical values and a p-value to perform the hypothesis test by setting α equal to .10, .05, .01, and .001.

(1) Formulate the null and alternative hypotheses needed to attempt to provide evidence that the percentage of work-stressed employees for the restaurant chain differs from the national percentage.

(2) Use critical values and a p-value to perform the hypothesis test by setting α equal to .10, .05, .01, and .001.

## Answer to relevant Questions

The manufacturer of the ColorSmart-5000 television set claims that 95 percent of its sets last at least five years without needing a single repair. In order to test this claim, a consumer group randomly selects 400 consumers ...In the Consolidated Power hypothesis test of H0: μ ≤ 60 versus Ha: μ > 60 ( as discussed in Exercise 9.45) find the sample size needed to make the probability of a Type I error equal to .025 and the probability of a Type ...In Exercise 9.54, test H0: σ = .2 versus Ha: σ > .2 at levels of significance .05 and .01. In exercise A manufacturer of coffee vending machines has designed a new, less expensive machine. The current machine is known to ...Several industries located along the Ohio River discharge a toxic substance called carbon tetrachloride into the river. The state Environmental Protection Agency monitors the amount of carbon tetrachloride pollution in the ...Suppose a sample of 49 paired differences that have been randomly selected from a normally distributed population of paired differences yields a sample mean of d-bar = 5 and a sample standard deviation of sd = 7. a. ...Post your question

0