Question 1
When performing a test of hypothesis at the .05 level of significance, if the p-value is determined to be .04
you will reject the null hypothesis.
True
False
Question 2
If the p-value for the slope in a linear regression is less than the level of significance, it means that the slope is not zero.
True
False
Question 3
If household income is normally distributed with a mean of $50,000 and a standard deviation of 10,000, the following
equation will give you the probability of randomly selecting a household with a income of more than $40,000.
1- normsdist(-1)
True
False
Question 4
When constructing 90% confidence interval for the one-sample mean (with the population standard deviation known)
the z value is approximately (plus or minus) 1.645.
True
False
Question 5
Suppose a non-normal population has a standard deviation of ten. If you take a sample of four observations, the
standard error would be 2.5.
True
False
Question 6
If you construct a 95% confidence interval, there is a 95% chance that the interval will contain the sample mean.
True
False
Question 7
Suppose that a normally distributed population has a mean of 12. The probability of randomly selecting a value of 11 or
higher is less than .50.
True
False
Question 8
As you quadruple the sample size (e.g., go from a sample size of 25 to 100) you cut the standard error in half.
True
False
Question 9
Suppose you are testing the following hypotheses at the .05 level of significance.
Ho: mu >=100
Ha: mu < 100
If your p-value is .75, it would be correct to claim that mu is at least 100.
True
False
Question 10
In multiple regression, if you can prove the slope is not equal to zero, then you can claim that there is a relationship
between the two variables.
True
False