STT 231 EXAM 2 QUESTIONS & ANSWERS(RATED A+)

STT 231 EXAM 2 QUESTIONS &
ANSWERS(RATED A+)
How does sample size influence the estimated effect size? - ANSWERNo effect

How does sample size influence degrees of freedom? - ANSWERincrease in sample
size, increase in degrees of freedom

How does sample size effect the value of the test statistic "t"? - ANSWERincrease in
sample size, increase in test statistic

How does sample size influence the p-value? - ANSWERas sample size increases, p-
value decreases

How does sample size influence MoE of your confidence interval? - ANSWERsample
size increases, MoE of CI decreases

Decide in favor of H0 when HA is true - ANSWERType 2 error

Decide in favor of HA when H0 is true - ANSWERType 1 error

Decide in favor of HA when HA is true - ANSWERsensitivity/power

Decide in favor of H0 when H0 is true - ANSWERspecificity

We fail to reject the null hypothesis if our p-value... - ANSWERif p-value >0.05

We reject the null hypothesis if our p-value... - ANSWERif p-value ≤0.05

An estimated effect size where |h.hat|≤0.2 means... - ANSWERwe have a small effect
size

An estimated effect size where 0.2<|h.hat|≤0.5 means... - ANSWERwe have a small-to-
moderate effect size

An estimated effect size where 0.5<|h.hat|≤0.8 means... - ANSWERwe have a
moderate-to-large effect size

An estimated effect size where |h.hat|≤0.8 means... - ANSWERwe have a large effect
size

If we conducted a hypothesis test about a population mean and calculate the t-test
statistic to be t=0.68, how would we interpret this value? - ANSWERWe would state that