Question

(5 points) Consider each of the statements below. For each statement, decide whether it is sometimes, always, or never a true statement. ? 1. In general, increasing the sample size in a statistical study will decrease the standard error of the statistic computed from the sample. ? 2. In a hypothesis test, the direction of the alternative hypothesis (right-tailed, left-tailed, or two-tailed) affects the way the effect size is estimated. 3. In order to compute Cohen's d, a statistician must directly know the sample size. 4. A hypothesis test of a single population mean that produces a t-test statistic t = 0 will produce an effect size d = 0. ? 5. If two identical studies on the same topic both produced estimated effect sizes less than d = 0.6, a third study that uses the same procedures will also produce an estimated effect size less than 0.6.

Answer 1

1))Always as standard error =standard deviation/√n

2) Never (as it is ration of estimated mean difference to standard deviaiton)

3) Never

4) ALways

5) sometimes