16 A research report states The difference between public an

16. A research report states: The difference between public and private school seventh graders\' attitudes toward minority groups was statistically significant at the 0.05 significance level. This means

A. None of the above are correct.

B. There is a probability of 0.05 that the attitudes of the two groups are different.

C. It has been proven that the two groups are different.

D. If there is no difference between groups, the difference observed in the sample would occur by chance with probability on no more than 0.05

Solution

Technically speaking option C is partially correct only . A hypothesis test always concludes based on the samples. So it is true that it has been proven that 2 groups are different but only based on the sample in hand. And difference is significant at 5% level of significance means the difference is significant but there is 5% chance that the hypothesis of no difference is falsely rejected. So none of B,D are correct and C is only partially correct