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

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

18th Edition

ISBN:9780079039897

Author:Carter

Publisher:Carter

Chapter10: Statistics

Section10.3: Measures Of Spread

Problem 1GP

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please answer the question below to 4 decimal places

The IQs of 25 CEGEP students were measured before and after a six month quarantine
because of the novel corona virus. The mean of the before scores was mBefore = 109.5 and the
mean of the after scores was mafter = 102.6. The variance of the difference scores was 64.
Compute the lower limit of the approximate 95% confidence interval around the estimated
effect size computed with mBefore– mAfter in the numerator.

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