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The mean change in muscle thickness observed after a 4-week training regimen was 4 mm, and the 95% confidence interval (CI) for mean change was (-0.5, 8.5). Which is the best scientific conclusion for the effectiveness of this regimen ?

The mean change in muscle thickness observed after a 4-week training regimen was 4 mm, and the 95% confidence interval (CI) for mean change was (-0.5, 8.5). Which is the best scientific conclusion for the effectiveness of this regimen ?

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 26PFA
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The mean change in muscle thickness observed after a 4-week training regimen was 4 mm, and the 95% confidence interval (CI) for mean change was (-0.5, 8.5). Which is the best scientific conclusion for the effectiveness of this regimen ?

QUESTION 33 The mean change in muscle thickness observed after a 4-week training regimen was 4 mm, and the 95% confidence interval (CI) for mean change was (-0.5, 8.5). Which is the best scientific conclusion for the effectiveness of this regimen? An increase in 4 mm is impressive, so the regimen has been proven effective. Although a mean increase was observed, it is not statistically significant because the 95% Cl includes zero change. The lower limit of the Cl is less than zero, which means a new person undergoing this training can be expected to lose muscle thickness. The upper limit of the Cl is greater than 8, which means that an increase of 8 mm is our best prediction for a new person undergoing this training.
Transcribed Image Text:QUESTION 33 The mean change in muscle thickness observed after a 4-week training regimen was 4 mm, and the 95% confidence interval (CI) for mean change was (-0.5, 8.5). Which is the best scientific conclusion for the effectiveness of this regimen? An increase in 4 mm is impressive, so the regimen has been proven effective. Although a mean increase was observed, it is not statistically significant because the 95% Cl includes zero change. The lower limit of the Cl is less than zero, which means a new person undergoing this training can be expected to lose muscle thickness. The upper limit of the Cl is greater than 8, which means that an increase of 8 mm is our best prediction for a new person undergoing this training.
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