21.
The best way to determine whether a statistically significant difference in two means is of practical importance is to
A:
Find a 95% confidence interval and notice the magnitude of the difference.
B:
Repeat the study with the same sample size and see if the difference is statistically significant again.
C:
See if the p-value is extremely small.
D:
See if the p-value is extremely large.
The answer is:
A