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To estimate the effect of CD writing, 30 users are asked to work on their laptops until the "low battery" sign comes on. Eighteen users without a CD writer worked an average of 5.3 hours with a standard deviation of 1.4 hours. The other twelve, who used their CD writer, worked an average of 4.8 hours with a standard deviation of 1.6 hours. Assuming Normal distributions with equal population variances, Does a CD writer change the battery life on a laptop? Alpha=0.10

To estimate the effect of CD writing, 30 users are asked to work on their laptops until the "low battery" sign comes on. Eighteen users without a CD writer worked an average of 5.3 hours with a standard deviation of 1.4 hours. The other twelve, who used their CD writer, worked an average of 4.8 hours with a standard deviation of 1.6 hours. Assuming Normal distributions with equal population variances, Does a CD writer change the battery life on a laptop? Alpha=0.10

A First Course in Probability (10th Edition)
A First Course in Probability (10th Edition)
10th Edition
ISBN:9780134753119
Author:Sheldon Ross
Publisher:Sheldon Ross
Chapter1: Combinatorial Analysis
Section: Chapter Questions
Problem 1.1P: a. How many different 7-place license plates are possible if the first 2 places are for letters and...
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To estimate the effect of CD writing, 30 users are asked to work on their laptops until the "low battery" sign comes on. Eighteen users without a CD writer worked an average of 5.3 hours with a standard deviation of 1.4 hours. The other twelve, who used their CD writer, worked an average of 4.8 hours with a standard deviation of 1.6 hours. Assuming Normal distributions with equal population variances, Does a CD writer change the battery life on a laptop? Alpha=0.10
Transcribed Image Text:To estimate the effect of CD writing, 30 users are asked to work on their laptops until the "low battery" sign comes on. Eighteen users without a CD writer worked an average of 5.3 hours with a standard deviation of 1.4 hours. The other twelve, who used their CD writer, worked an average of 4.8 hours with a standard deviation of 1.6 hours. Assuming Normal distributions with equal population variances, Does a CD writer change the battery life on a laptop? Alpha=0.10
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