Mathematics, 28.07.2020 20:01 khushailawadip9dkn2
Construct a confidence interval for mu Subscript dμd the mean of the differences d for the population of paired data. Assume that the population of paired differences is normally distributed. A test of writing ability is given to a random sample of students before and after they completed a formal writing course. The results are given below. Construct a 99% confidence interval for the mean difference between the before and after scores.
Before 70 80 92 99 93 97 76 63 68 71 74
After 69 79 90 96 91 95 75 64 62 64 76
a. -0.2 < μd < 4.2.
b. -0.5 < μd < 4.5.
c. -0.1 < μd < 4.1.
d. 1.2 < μd < 2.8.
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Construct a confidence interval for mu Subscript dμd the mean of the differences d for the populatio...
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