1) Use technology and a t-test to test the claim about the population mean at the given level of significance using the given sample statistics. Assume the population is normally distributed.

Claim: >80; =0.05Sample statistics: x=82.8, s=2.9, n= 27

2) Test the claim about the population mean at the level of significance . Assume the population is normally distributed.Claim: <4815; =0.01Sample statistics: x=4917, s=5501, n= 53

3) Use a t-test to test the claim about the population mean at the given level of significance using the given sample statistics. Assume the population is normally distributed.

Claim: 29; =0.01Sample statistics: x=29.7, s=4.3, n= 14

5) A consumer group claims that the mean minimum time it takes for a sedan to travel a quarter mile is greater than 14.7

seconds. A random sample of 21 sedans has a mean minimum time to travel a quarter mile of 15.3 seconds and a standard deviation of 2.12 seconds. At =0.05 is there enough evidence to support the consumer group's claim? Complete parts (a) through (d) below. Assume the population is normally distributed.

6) An oceanographer claims that the mean dive duration of a North Atlantic right whale is 11.6minutes. A random sample of

36 dive durations has a mean of 12.1 minutes and a standard deviation of 2.2 minutes. At =0.10 is there enough evidence to reject the oceanographer's claim? Complete parts (a) through (d) below. Assume the population is normally distributed.

7) You receive a brochure from a large university. The brochure indicates that the mean class size for full-time faculty is fewer than 31 students. You want to test this claim. You randomly select 18classes taught by full-time faculty and determine the class size of each. The results are shown in the table below. At =0.01, can you support the university's claim? Complete parts (a) through (d) below. Assume the population is normally distributed.

34	25	28	30	32	40	23	26	28
25	28	33	35	29	24	31	26	28