Exhibit 10-30 A quantitative analysis teacher wants to see if there is any difference in the abilities of students enrolled in statistics in the summer and in the fall. Examination scores from a random sample of students enrolled this fall and from a random sample of students enrolled in the summer were selected. You are given the following information. x 0 n -9.92 to -2.08 -3.92 to 3.92 -15.84 to -1.84 Fall -19.80 to -1.74 74 17.06 35 Refer to Exhibit 10-30. The 95% confidence interval for the difference between the two population means is Summer 84.77 19.01 28

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Exhibit 10-30
A quantitative analysis teacher wants to see if there is any difference in the abilities of students enrolled in statistics in
the summer and in the fall. Examination scores from a random sample of students enrolled this fall and from a random
sample of students enrolled in the summer were selected. You are given the following information.
x
σ
n
-9.92 to -2.08
-3.92 to 3.92
-15.84 to -1.84
Fall
-19.80 to -1.74
74
17.06
35
Refer to Exhibit 10-30. The 95% confidence interval for the difference between the two population means is
Summer
84.77
19.01
28
Transcribed Image Text:Exhibit 10-30 A quantitative analysis teacher wants to see if there is any difference in the abilities of students enrolled in statistics in the summer and in the fall. Examination scores from a random sample of students enrolled this fall and from a random sample of students enrolled in the summer were selected. You are given the following information. x σ n -9.92 to -2.08 -3.92 to 3.92 -15.84 to -1.84 Fall -19.80 to -1.74 74 17.06 35 Refer to Exhibit 10-30. The 95% confidence interval for the difference between the two population means is Summer 84.77 19.01 28
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The given mean of students enrolled fall is 74, population standard deviation is 17.06 and sample size is 35, the mean of students enrolled summer is 84.77, population standard deviation is 19.01 and sample size is 28.

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