State What The Given Confidence Interval Suggests About The Two Population Means A Researcher Was Interested In Compari 1 (101.44 KiB) Viewed 27 times
State What The Given Confidence Interval Suggests About The Two Population Means A Researcher Was Interested In Compari 2 (71.14 KiB) Viewed 27 times
State what the given confidence interval suggests about the two population means. A researcher was interested in comparing the heights of women in two different countries. Independent simple random samples of 9 women from country A and 9 women from country B. The following 90% confidence interval was obtained for 11-12. the difference between the mean height of women in country A and the mean height of women in country B. -4.34 in. <H1 - M2 < -0.03 in What does the confidence interval suggest about the population means? O The confidence interval includes only negative values which suggests that the mean height of women from country A is smaller than the mean height of women from country B.. O The confidence interval includes O which suggests that the two population means might be equal. There doesn't appear to be a significant difference between the mean height of women from country A and the mean height of women from country B. The confidence interval includes only negative values which suggests that the two population means might be equal. There doesn't appear to be a significant difference between the mean height of women from country A and the mean height of women from country B. The confidence interval includes only negative values which suggests that the mean height of women from country A is greater than the mean height of women from country B. O
Construct the indicated confidence interval for the difference between the two population means. Assume that the two samples are independent simple random samples selected from normally distributed populations. Do not assume that the population standard deviations are equal. A researcher was interested in comparing the GPAs of students at two different colleges. Independent simple random samples of 8 students from college A and 13 students from college B yielded the following statistics. College A: 77 - 3.1125, 51 = 0.4357 : College B: *2 = 3.4385, 52 = 0.5485 Construct a 95% confidence interval for 41 - w2, the difference between the mean GPA of college A students and the mean GPA of college B students. -0.81 < 1 - 42 < 0.15 -0.70 <H1-H2 < 0.05 -0.75 5 < 41-42 < 0.10 O -0.78 <H1 - H2 < 0.13
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