The mean test score of a sample of 28 students in a Statistics class is 85, with a standard deviation of 7. a) Construct a 96% confidence interval for the mean test score of Statistics students. Round your answer to 3 decimal places. b) What is the margin of error of this interval? The margin of error is ______ c) Interpret your findings. You can be 96% confident that the population mean is somewhere between 78 and 92, 81 and 90, 82 and 88, or 83 and 85 d) Is the true population mean likely to be an A (90 or more)? Yes or no

Glencoe Algebra 1, Student Edition, 9780079039897, 0079039898, 2018
18th Edition
ISBN:9780079039897
Author:Carter
Publisher:Carter
Chapter10: Statistics
Section10.3: Measures Of Spread
Problem 11PPS
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The mean test score of a sample of 28 students in a Statistics class is 85, with a standard deviation of 7.

a) Construct a 96% confidence interval for the mean test score of Statistics students.

Round your answer to 3 decimal places.

b) What is the margin of error of this interval?

The margin of error is ______

c) Interpret your findings.

You can be 96% confident that the population mean is somewhere between 78 and 92, 81 and 90, 82 and 88, or 83 and 85

d) Is the true population mean likely to be an A (90 or more)? Yes or no                                                         

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