QUESTION 16

You may need to use the appropriateappendix tableortechnologyto answer this question.

A random sample of82tourists in Chattanooga showed that they spent an average of $2,800(in a week) with a standard deviation of $124. A sample of59tourists in Orlando showed that they spent an average of $2,875(in a week) with a standard deviation of $135. We are interested in determining if there is any significant difference between the average expenditures of all the tourists who visited the two cities.

(a)Determine the degrees of freedom for this test. (Round your answer down to the nearest integer.)

(b)Compute the test statistic. (Use ChattanoogaOrlando. Round your answer to three decimal places.)

(c)Compute thep-value. (Round your answer to five decimal places.)

QUESTION 20

You may need to use the appropriatetechnologyto answer this question.

In order to determine whether or not a driver's education course improves the scores on a driving exam, a sample of 6 drivers were given the exam before and after taking the course. The results are shown below. Assume the population of differences is normally distributed.

Driver	Score Before the Course	Score After the Course
1	84	87
2	89	88
3	95	91
4	76	77
5	86	93
6	79	83

Letd= Score AfterScore Before.

(a)Compute the test statistic. (Round your answer to three decimal places.)

(b)Using= 0.05 and thep-value approach, test to see if taking the course actually increased scores on the driving exam.

Calculate thep-value. (Round your answer to four decimal places.)

p-value =