The mean score on the math portion of the ACT for the year 2000 is ? = 20.7. A s

Question

The mean score on the math portion of the ACT for the year 2000 is ? = 20.7. A sample of 20 students in a local school district had a mean of 22.95. Using the sample, a 95% confidence interval estimate for the mean is (20.76, 25.14). State the point estimate for the mean ACT score for students. Based on this sample information, do you believe that the local students have a mean different from the general population? Why? 22.95 is in the center of the interval. The means are definitely not different. 22.95 is not equal to 20.7. The means are definitely different. 22.95 is just outside the 95% confidence interval. Can't say the means are really different. 20.7 is just outside the 95% confidence interval. Can't say the means are really different. 5 points Question 10 An education support group wants to estimate the mean class size for elementary schools in

Explanation / Answer

HEre the point estimate for the mean ACT score for students = 22.95

Here we beleive that local students are definitely different from the general population as 20.7 is not inside the 95% cconfidence interval.

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