Author Question: The expected value of the difference of two sample means equals the difference of the corresponding ... (Read 87 times)

BrownTown3 · **on:** Jun 24, 2018

The expected value of the difference of two sample means equals the difference of the corresponding population means when:
a. the populations are normally distributed.
b. the samples are independent.
c. the populations are approximately normal and the sample sizes are large.
d. All of these choices are true.

Question 2

The effect that business recessions and prosperity have on time series values is an example of the disaster component of a time series.
Indicate whether the statement is true or false