Q1) A researcher uses hypothesis test to estimate H0 µ= 80. Which combination of factors is most probable to result in rejecting null hypothesis?

a)  M = 85 and α= .01

b)  M = 85 and α= .05

c)  M = 90 and α = .01

d)  M = 90 and α = .05

Q2) If treatment has very small effect, then hypothesis test estimating the treatment effect is possible to _____.

a) result in a Type I error

b) result in a Type II error

c) correctly reject the null hypothesis

d) correctly fail to reject the null hypothesis

Q3) If treatment has very small effect, then hypothesis test is expected to

a) result in a Type I error.

b) result in a Type II error.

c) correctly reject the null hypothesis.

d) correctly fail to reject the null hypothesis.

Q4) A researcher administers treatment to sample of n = 25 participants and uses hypothesis test to estimate effect of treatment. Hypothesis test produces z-score of z = 2.77. Suppose that researcher is using two-tailed test,

a) The researcher rejects null hypothesis with α= .05 but not with α= .01.

b) The researcher must reject the null hypothesis with either α= .05 or α= .01.

c) The researcher must fail to reject H0 with either α= .05 or  α= .01.

d) Can't answer without additional information.