6 If we test Null mu 100 against Alternative mu 100 the re

6.) If we test Null: mu = 100 against Alternative: mu < 100, the region of rejection will be located

a. in the center

b. at the two extremes

c. at the extreme left

d. at the extreme right

7.) The region of rejection is determined by

a. the level of significance

b. the nature of the alternative hypothesis

c. both (a) and (b)

d. neither (a) nor (b)

8.) A type 1 error is committed when a

a. true null hypothesis is rejected

b. true alternative hypothesis is retained

c. Alpha is higher than it should be

d. false null hypothesis is retained

9.) a type ii error is committed when we reject a null hypothesis

a. true null hypothesis is rejected

b. alpha is higher than it should be

c. false alternative hypothesis is retained

d. false null hypothesis is retained

10.) When we use the .05 level of significance,

a. we will accept false hypothesis 5% of the time

b. we will be wrong 5% of the time

c. we will be right 5% of the time

d. we will reject true hypotheses 5% of the time

Solution

6.

c) at the extreme left

This is because of the < sign in the Ha.

7.

C. BOTH A AND B

We need the level of significance to say \"how strict\" we are; we need the nature of the alternative hypothesis so we know if it is directional.

8.

A. A TRUE NULL HYPOTHESIS IS REJECTED

9.

D. FALSE NULL HYPOTHESIS IS RETAINED

10.

d. we will reject true hypotheses 5% of the time