48. Newly purchased tires of a certain type are supposed to be filled to a pressure of 30 lb/in2

. Let denote the true average pressure. Find the P-value associated with each given z statistic value for testing H0:
30 versus Ha: 30.

a. 2.10

b. 1.75

c. .55

d. 1.41

e. 5.3 49. Give as much information as you can about the P-value of a t test in each of the following situations:

a. Upper-tailed test, df
8, t
2.0

b. Lower-tailed test, df
11, t
2.4

c. Two-tailed test, df
15, t
1.6

d. Upper-tailed test, df
19, t
.4

e. Upper-tailed test, df
5, t
5.0

f. Two-tailed test, df
40, t
4.8