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An article gave the following summary data on stress limits for specimens using two different types of wood. Sample SD 0.70 9.32 8.47 1.18 (a) Compute the 95% two-sample t confidence interval for the difference of the true mear strength between the two groups. Side Coating Sample Size Sample Mean Oak 18 Maple 17 (b) Compute the 95% pooled t confidence interval for the difference of the true mean strength between the two groups. (c) Test whether the variances of the two groups are equal and evaluate whether the pooled t procedure is a reasonable method at a = 0.1.

An article gave the following summary data on stress limits for specimens using two different types of wood. Sample SD 0.70 9.32 8.47 1.18 (a) Compute the 95% two-sample t confidence interval for the difference of the true mear strength between the two groups. Side Coating Sample Size Sample Mean Oak 18 Maple 17 (b) Compute the 95% pooled t confidence interval for the difference of the true mean strength between the two groups. (c) Test whether the variances of the two groups are equal and evaluate whether the pooled t procedure is a reasonable method at a = 0.1.

MATLAB: An Introduction with Applications
MATLAB: An Introduction with Applications
6th Edition
ISBN:9781119256830
Author:Amos Gilat
Publisher:Amos Gilat
Chapter1: Starting With Matlab
Section: Chapter Questions
Problem 1P
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An article gave the following summary data on stress limits for specimens using two different types of wood. Side Coating Sample Size Sample Mean Oak Maple Sample SD 9.32 0.70 8.47 1.18 (a) Compute the 95% two-sample t confidence interval for the difference of the true mean strength between the two groups. 18 17 (b) Compute the 95% pooled t confidence interval for the difference of the true mean strength between the two groups. (c) Test whether the variances of the two groups are equal and evaluate whether the pooled t procedure is a reasonable method at a = 0.1.
Transcribed Image Text:An article gave the following summary data on stress limits for specimens using two different types of wood. Side Coating Sample Size Sample Mean Oak Maple Sample SD 9.32 0.70 8.47 1.18 (a) Compute the 95% two-sample t confidence interval for the difference of the true mean strength between the two groups. 18 17 (b) Compute the 95% pooled t confidence interval for the difference of the true mean strength between the two groups. (c) Test whether the variances of the two groups are equal and evaluate whether the pooled t procedure is a reasonable method at a = 0.1.
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