. Two randomly selected groups of 200 students each were taught two different me

Question

. Two randomly selected groups of 200 students each were taught two different memorization methods over a four week period. At the end of four weeks a memorization test with a maximum possible score of 100 was given. The confidence interval of the difference in the two group population mean scores on the memorization test was (01-03). What statement best reflects the results of this study.

A) the results are not statistically significant, but are of practical significance

B) the results are statistically significant, but probably not of practical significance since the true population mean difference is a very small percentage of the total points possible (difference in points is 1% to 3% of the total points possible)

C) the results are statistically significant and also of practical significance since the true population mean difference in points is 1% to 3% of the total points possible.

D) the results are not statistically significant and also not of practical significance

Explanation / Answer

Option B is correct :

The results are statistically significant, but probably not of practical significance since the true population mean difference is a very small percentage of the total points possible (difference in points is 1% to 3% of the total points possible)

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