A statistics teacher wants to see if there is any difference in the abilities of students enrolled in statistics today and those enrolled five years ago. A sample of final examination scores from students enrolled today and from students enrolled five years ago was taken. You are given the following information. Five Today Years x 86 89 $\sigma^2$ 102.5 58.5 n 41 39 Find the $p$-value for the difference between the two population means. 0.9332 0.1336 0.0668 0.8664
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The null hypothesis is that there is no difference in the abilities of students enrolled in statistics today and those enrolled five years ago. The alternative hypothesis is that there is a difference in the abilities of the two groups. Show more…
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A statistics teacher wants to see if there is any difference in the abilities of students enrolled in statistics today and those enrolled five years ago. A sample of final examination scores from students enrolled today and from students enrolled five years ago was taken. You are given the following information: Five Years Ago: 80 89 112.5 54 45 36 Today: 82 70 112.5 45 36 36 Refer to Exhibit 10-3. The point estimate for the difference between the means of the two populations is 58.5.
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