A medical investigation claims that the average number of infections per week at a hospital in Westchester is more than 26. A random sample of 10 weeks had a mean number of 27 infections. The sample standard deviation is 1.8 Is there enough evidence to reject the investigator's claim at alpha =.025?

When doing a test, steps to be covered:

1. state the hypothesis and identify the claim
2. find the critical value from the table
3. compute the test value
4. make the decision to reject or not the null hypothesis

DO NOT PERFORM A p TEST or use a statistics software.