Reconsider the situation described in Exercise 81 of Chapter 9 and the accompanying Mini...

Reconsider the situation described in Exercise 81 of Chapter 9 and the accompanying Minitab output (the Greek letter eta is used to denote a median).

a. Verify that the value of Minitab’s test statistic is correct.

b. Carry out an appropriate test of hypotheses using a significance level of .01.

Reference in Exercise 81 of Chapter 9

The accompanying data on response time appeared in the article “The Extinguishment of Fires Using Low-Flow Water Hose Streams—Part II” (Fire Technology, 1991: 291–320).

The authors analyzed the data with the pooled t test. Does the use of this test appear justified? [Hint: Check for normality. The z percentiles for n = 8 are – 1.053, and –1.53, –.89, –.49, –.15, .15, .49, .89, and 1.53.]