Author Question: When a hypothesis test is to be conducted regarding a population variance, the test statistic will ... (Read 90 times)

fasfsadfdsfa · **on:** Jun 24, 2018

When a hypothesis test is to be conducted regarding a population variance, the test statistic will be:

A) a t-value from the t-distribution.
B) an x2 value from the chi-square distribution.
C) a z-value from the standard normal distribution.
D) a binomial distribution p value.

Question 2

Three events occur with probabilities P(E1 ) = 0.35, P(E2 ) = 0.15, P(E3 ) = 0.40. If the event B occurs, the probability becomes P(E1B) = 0.25, P(B) = 0.30. Calculate P(E1 and B).

A) 0.575
B) 0.075
C) 0.021
D) 0.475