The average measured verbal IQ (IQV) scores of children is 100. In a sample of 20 children, the average was 86.9. Assume the population is normally distributed, and the population standard deviation is 18.5 How large a sample must be obtained to be 94% confident that the true mean IQV is within 2 points of the sample mean?

The average measured verbal IQ (IQV) scores of children is 100. In a sample of 20 children, the average was 86.9. Assume the population is normally distributed, and the population standard deviation is 18.5 How large a sample must be obtained to be 94% confident that the true mean IQV is within 2 points of the sample mean?

Glencoe Algebra 1, Student Edition, 9780079039897, 0079039898, 2018

18th Edition

ISBN:9780079039897

Author:Carter

Publisher:Carter

Chapter10: Statistics

Section10.5: Comparing Sets Of Data

Problem 13PPS

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