The mean of a standard normal probability distribution
a. is always equal to zero.
b. can be any value as long as it is positive.
c. can be any value.
d. is always greater than zero.
Question 2
In the past, 35 of the students at ABC University were in the Business College, 35 of the students were in the Liberal Arts College, and 30 of the students were in the Education College. To see whether or not the proportions have changed, a sample of 300 students from the university was taken. Ninety of the sample students are in the Business College, 120 are in the Liberal Arts College, and 90 are in the Education College. Using = .05, the conclusion of the test is that the
a. null hypothesis cannot be rejected.
b. proportions have not changed significantly.
c. proportions follow normal distribution.
d. Marascuilo procedure is more applicable.
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