Question
A random sample of six music students played a short song, and the number of mistakes...
A random sample of six music students played a short song, and the number of mistakes in music each student made was recorded. After they practiced the song 5 times, the number of mistakes each student made was recorded. The data are shown. At =α0.10, can it be concluded that there was a decrease in the mean number of mistakes? Assume that all variables are normally or approximately normally distributed. Let μ1 be the mean before practicing and μD=μ1-μ2.
| Student | A | B | C | D | E | F |
| Before | 12 | 14 | 9 | 8 | 8 | 4 |
| After | 11 | 12 | 5 | 7 | 13 | 3 |
A) Find the critical values.
B) Compute the test value.
C) Reject or do not reject the null hypothesis.
D) There is or is not enough evidence to support the claim.
Homework Answers
Answer #1
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