Q 43

If you increase the confidence level,the confidence interval:
A) decreases
B) increases
C) stays the same
D) may increase or decrease,depending on the sample data

Q 44

The general form of a confidence interval is:
A) Point Estimate = Multiple × Standard Error
B) Point Estimate = Multiple +Standard Error
C) Point Estimate ± Multiple × Standard Error
D) Point Estimate = Multiple ± Standard Error

Q 45

Two independent samples of sizes 50 and 50 are randomly selected from two populations to test the difference between the population means,
)The sampling distribution of the sample mean difference
Is:
A) normally distributed
B) approximately normal
C) t - distributed with 98 degrees of freedom
D) chi-squared distributed with 99 degrees of freedom