Confidence Intervals: Confidence Interval Lab III Student Learning Outcomes: • T

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Confidence Intervals: Confidence Interval Lab III

Student Learning Outcomes: • The student will calculate a 90% confidence interval using the given data.

Chould you guys please helpe me abouyt 6 7 8 .

7. Exp 8. Supp infor rta This lab Chapter 8 Class Time: Names: Confidence Intervals: Confidence Interval Lab III Student Learning outcomes: The student will calculate a 90% confidence interval using the given data. The student will examine the relationship between the confidence level and the percent of constructed intervals that contain the population average. Given: Heights of 100 women (in inches) 594 71.6 2-1 69.3 65.0 G 62.9 3 66.5 55.2 675 6.2 65.5 61.9 69.6 58.7 634 60.6 66.8 1.3 59.2 64.1 59.3 66.3 62.4 70 70.9 64.9 62.9 65.0 64.1 61.1 65.3 64.6 59.2 61.4 62.0 63.5 61.4 58.8 62.3 62.4 67.5 20 63.2 4 56.6 no 67.7 62.5 what ton AS.

Explanation / Answer

6. Count of the data values that lie in your confidence interval (61.48, 64.90) are 40 out of 100. The percent is 40%. It is nowhere close to 90%.

The minimum lower limit of interval is 57.65 and maximum upper limit of interval is 67.24. . Count of the data values that lie in your confidence interval (57.65, 67.24) is 89 out of 100. . The percent is 89%. It is close to 90%.

7. The confidence interval are calculated with sample of 10 (10% of the data) random values. The sample size should be large enough to capture the true population values or repeated sample should be taken and the 90% confidence interval to be computed for each sample.

8. If repeated samples were taken and the 90% confidence interval computed for each sample, 90% of the intervals would contain the population mean. Naturally, 10% of the intervals would not contain the population mean. So for a single sample of heights of 10 women, we are not 100 % sure (for certain) that the confidence interval actually contained the population mean.

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