The residents of Austin, Texas, complain that parking fines given in their city are higher than the parking fines that are given in Houston. Independent random samples of the amounts paid by residents for parking tickets in each of two cities over the last four months were obtained. Assume the population variances are equal. These amounts were as follows:

Austin	80	125	144	98	138	100	129	113	132	115
Houston	98	85	114	100	76	85	120	105

1) What is the mean of the parking fines issued in Austin?

A) 78.30

B) 97.88

C) 117.40

D) 146.75

2) Find the 98% confidence interval for the difference in the mean costs of parking tickets in these two cities. 22) ______

A) 19.52 ± 25.37

B) 19.52 ± 22.77

C) 19.52 ± 22.21

D) 19.52 ± 20.38

3) Calculate the pooled sample variance.

A) 595.042

B) 468.006

C) 554.593

D) 328.455

4) What is the mean of the parking fines issued in Houston?

A) 97.88

B) 78.30

C) 117.40

D) 146.75

5) What is the sample variance of the parking fines issued in Austin?

A) 201.86

B) 404.49

C) 230.69

D) 364.04

6) What is the sample variance of the parking fines issued in Houston?

A) 404.49

B) 364.04

C) 201.86

D) 230.69