1.In a hypothesis test, α indicates:
a) the area of the rejection region for the null hypothesis
b) the probability of a Type II error
c) whether the test is one-tailed or two-tailed
d) the probability of accepting the null hypothesis
2. If a null hypothesis is μ= 80, and alternative hypothesis is μ>80, then the area of rejection for the null hypothesis is
a) to the left of the critical value of z.
b) to the right of the critical value of z.
c) located in the two tails
d) cannot be determined from the given information.
3.A type I error is made when you:
a) fail to reject H0 when H0 is false.
b) reject H0 when H0 is true.
c) fail to reject H0 when H0 is false.
d) reject H0 when H0 is false.
4. When a null hypothesis cannot be rejected, we conclude that:
a) the null hypothesis is true
b) the null hypothesis may be true
c) the alternative hypothesis is true
d) the alternative hypothesis may be true
5. In a hypothesis test with null hypothesis μ = 30, it is a Type II error to conclude that:
a) the mean is not equal to 30 when it is equal to 30
b) the mean is greater than 30 when it is equal to 30
c) the mean is less than 30 when it is actually 30
d) Accepting the mean is 30 when it is not
6.In conducting a hypothesis test, we always assume in the procedure that:
a) the alternative hypothesis is true
b) the alternative hypothesis is false
c) the null hypothesis is true
d) the null hypothesis is false
7. If a null hypothesis is μ= 60, and alternative hypothesis is μ< 60, then the area of rejection for the null hypothesis is
a) to the left of the critical value of z.
b) to the right of the critical value of z.
c) located in the two tails
d) cannot be determined from the given information.
8. Hypothesis testing does not involve:
a) using the data to calculate the value of the test statistic
b) formulating null and alternative hypotheses
c) constructing a test criterion
d) using the data to calculate the level of significance
9.Which of the following is a possible null hypothesis for a two-tailed hypothesis test?
a) μ > 30
b) μ = 30
c) μ < 30
d) μ ≠ 30
10.The location of rejection region for the null hypothesis is determined by:
a) the sign in the null hypothesis
b) the sign in the alternative hypothesis
c) the size of α
d) the size of n