Mistakes in a Song 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 a = 0.05, 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 µ, be the mean before practicing and !D = 41-42. Student A в C DE F Before 10 4 7 8 After 8 7 12 2 7 3.

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Mistakes in a Song 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 a = 0.05, 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 µ, be the mean before practicing and u, = 41-.
Student
CDE F
A
B
Before
9 10
9
4
7 8
After
8
7
12
3 2 7
Send data to Excel
Transcribed Image Text:Mistakes in a Song 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 a = 0.05, 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 µ, be the mean before practicing and u, = 41-. Student CDE F A B Before 9 10 9 4 7 8 After 8 7 12 3 2 7 Send data to Excel
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