Question

If you have 1 group and know the population standard deviation, which test statistic do you use? Question 20 options:

A) dependent samples T-test

B) 2 independent samples T-test

C) Z-test

D) single group T-test

2) The null hypothesis for the dependent t-test is essentially the same as Question 14 options:

A) Null hypothesis for a Z-score hypothesis test

B) Null hypothesis for a 1 group t-test

C) Null hypothesis for a two independent groups t- test

D) The effect size

3) What happens to your obtained z or t value if you used a two-tailed test instead of a one-tailed test for the same sample? Question 8 options:

a) The obtained value will be negative

b) The obtained value will be in the region of rejection

c) Nothing, the obtained value remains the same

d) The null hypothesis is less likely to be rejected

Answer 1

Q20. If we know the population standard deviation and for one-group, we will use z-test which is used to compare the sample mean to a hypothetical value.
Correct option: C) Z-test

Q21. For a dependent t-test or paired samples t-test, the null hypothesis is that:

Ho: Ud = 0 (the mean difference)

This is essentially the same as null hypothesis for a 1 group t-test
Correct option: B)

3) The obtained z or t-value will remain the same as the formula is same, but the region of rejection or the result changes depending on the test is one-tailed or two-tailed
Correct option: C) Nothing, the obtained value remains the same