Mar 29 review

Which of the following is an appropriate alternative hypothesis for a one-tailed t-test?

• μ1 > μ2

• μ1 = μ2

• μ1 ≠ μ2

• μ1 = 12

Which of the following is an appropriate alternative hypothesis for a two-tailed t-test?

• μ1 > μ2

• μ1 = μ2

• μ1 ≠ μ2

• μ1 = 12

μ1 = μ2 is a appropriate null hypothesis for which of the following?

• one-sample t-test

• ANOVA

• two-sample t-test

Which of the following is FALSE about one-tailed and two-tailed t-tests?

• p-value < α results in rejection of the null for both one-tailed and two-tailed t-tests.

• You can choose a one-tailed t-test if you are only interested in a relationship in a particular direction.

• One-tailed have more statistical power when testing the same hypothesis.

• You can choose a one-tailed t-test if you know the mean of one group is higher than the other.

Suppose we have conducted a t-test α = 0.05 and the p-value = 0.04.

TRUE or FALSE: There is a 4% chance the null hypothesis is true.

• TRUE

• FALSE

Suppose we have conducted a t-test α = 0.05 and the p-value = 0.04.

TRUE or FALSE: We reject H0

• TRUE

• FALSE

Suppose we have conducted a t-test α = 0.05 and the p-value = 0.04.

TRUE or FALSE: We should reject H0. If we repeated the experiment, there is a 4% chance that we would reject H0 again.

• TRUE

• FALSE

Suppose we have conducted a t-test α = 0.05 and the p-value = 0.04.

TRUE or FALSE: If H0 is true, the probability of getting a test statistic at least as extreme as the value of the Ts that was actually obtained is 4%

• TRUE

• FALSE

Which of the following inferences could you gain from an ANOVA?

• At least one of μ1, μ2, and μ3 are different.

• μa is more than μb and μc.

• μa, μb, and μc are equal.

• μa, μb, and μc are all different from each other.

Which of the following inferences could you gain from an Tukey HSD?

• At least one of μ1, μ2, and μ3 are different.

• μa is more than μb and μc.

• μa, μb, and μc are equal.

• μa, μb, and μc are all different from each other.