Which of the following is the best one-sentence summary of these results?

A. There was no significant difference on anxiety between the beginning and the end of

the semester, but the effect size is large.

B. There was no significant difference on anxiety between the beginning and the end of

the semester, and the effect size is small.

C. There was a significant difference on anxiety between the beginning and the end of the

semester, and the effect size is large.

D. There was a significant difference on anxiety between the beginning and the end of the

semester, but the effect size is small.

Q48

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Q50

An experiment was done to determine if a program designed to improve the dental

health of young girls and boys was effective.

A. concluding that the program did improve dental health when it really did not

B. concluding that the program did not improve dental health when it really did not

C. concluding that the program did improve dental health when it really did

D. concluding that the program did not improve dental health when it really did

Q48 Which of the above statements describes a Type I error?

Q49 Which of the above statements describes a Type II error?

Q50 Which of the above statements describes statistical power?