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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.

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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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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