9.
Right tailed, mean
10.
Left tailed, proportion
11.
Two tailed, sigma
12.
Right tailed, proportion
13.
Left tailed, mean
14.
Two tailed, sigma
15.
Ho: P = .399
H1: P > .399
To make a type I error we have to say that the proportion of students enrolled in Joiliet Junior college and earn a bachelors in six years is greater than .399, when it is actually not greater than .399.
Making a type II error would mean that we conclude that the proportion of students enrolled in Joliet Junior college and earn a bachelors degree is not greater than .399, when it is actually greater than .399.
17.
Ho: M = $245,700
H1: M < $245,700
To make a type I error we have to say that the existing home prices are less than $245,700 when they are actually not lower than $245,700.
To make a type II error we have to conclude that the existing home prices are not less than $245,700, when they actually are lower than $245,700.
19.
Ho: Sigma = 0.7
H1: Sigma < 0.7
To make a type I error we have to say that the pressure variability is less than 0.7 when it is actually not less than 0.7.
To make a type II error we have to say that the pressure variability is not less than 0.7 when it is actually less than 0.7.
21.
Ho: M = $48.79
H1: M (does not =) $48.79
To make a type I error we have to say that the mean monthly revenue per cell phone is not equal to $48.79 when it is actually equal to $48.79.
To make a type II error we have to say that the mean monthly revenue per cell phone is equal to $48.79 when it is actually not equal to $48.79.