# Question: Refer to Exercise 22 There a study examined the average

Refer to Exercise 22. There a study examined the average hospital stay for patients under the care of each of two classes of physicians— hospitalists and general internists. Suppose now that the two population standard deviations are unknown and that sample results were as follows: Patients in the sample who were cared for by internists stayed for an average of 4.59 days, with a sample standard deviation of 1.8 days, while patients in the sample who were cared for by hospitalists had an average stay of 4.1 days, with a sample standard deviation of 1.3 days. Set up the appropriate hypothesis test to test a “no difference in population means” null hypothesis at the 1% significance level, assuming sample sizes were

a. 10 patients who were cared for by internists and 15 patients who were cared for by hospitalists. Assume that the population distributions are normal and have equal standard deviations.

b. 100 patients who were cared for by internists and 150 patients who were cared for by hospitalists.

a. 10 patients who were cared for by internists and 15 patients who were cared for by hospitalists. Assume that the population distributions are normal and have equal standard deviations.

b. 100 patients who were cared for by internists and 150 patients who were cared for by hospitalists.

## Relevant Questions

Refer to Exercise 1. You want to set up a test for the following hypotheses: H0: π > .4 Ha: π < .4 You will have a random sample of 200 population members to make your decision. a. Compute the pvalue for the .365 sample ...Refer to Exercise 33. You have a random sample of 500 population members from each of two populations and you want to set up a test for the following hypotheses: H0: μ1 – μ2 < 0 Ha: μ1 – μ2 > 0 a. Compute the ...Montparnasse Sports selected six University of Georgia tennis players to test the durability of its two new polyester racket strings. The table below shows how long the test strings lasted before they broke. Treating the six ...A recent article by a writer for trentonian. com stated that no more than 20% of Americans support increased oil exploration off the east coast of the US. To test that claim, a sample of 500 randomly selected adults is ...The telecommunications manager at the Lowell Call Center is concerned about the difference in average system downtime between day and night operations at the center. A random sample of 45 day shift records and 45 night shift ...Post your question