Question

In a study, steel rods supplied by two different companies were compared. Springs were made out of the steel rod supplied by each company, and the "bounciness" was studied. Company A 9.3 8.8 6.8 8.7 8.5 6.7 8.0 8.8 6.5 9.2 7.0 Company B 11.0 9.8 9.9 10.2 10.1 9.7 11.0 11.1 10.2 10.2 9.6 On 0.10 level of significance, can we conclude that the population variances in the steel rods supplied by these companies are equal? Assume both population are approximately normal. Show all your work.

          In a study, steel rods supplied by two different companies were compared. Springs were made out of the steel rod supplied by each company, and the "bounciness" was studied.
Company A
9.3 8.8 6.8 8.7 8.5 6.7 8.0 8.8 6.5 9.2 7.0
Company B
11.0 9.8 9.9 10.2 10.1 9.7 11.0 11.1 10.2 10.2 9.6
On 0.10 level of significance, can we conclude that the population variances in the steel rods supplied by these companies are equal? Assume both population are approximately normal. Show all your work.

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In a study, steel rods supplied by two different companies were compared. Springs were made out of the steel rod supplied by each company, and the "bounciness" was studied.
Company A
9.3 8.8 6.8 8.7 8.5 6.7 8.0 8.8 6.5 9.2 7.0
Company B
11.0 9.8 9.9 10.2 10.1 9.7 11.0 11.1 10.2 10.2 9.6
On 0.10 level of significance, can we conclude that the population variances in the steel rods supplied by these companies are equal? Assume both population are approximately normal. Show all your work.

Added by Samuel R.

Elementary Statistics a Step by Step Approach

Allan G. Bluman 9th Edition

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Solved by Expert Adi S

05/06/2023

Step 1

Null hypothesis (H0): The population variances of the steel rods supplied by the two companies are equal, i.e., σ₁² = σ₂². Alternative hypothesis (H1): The population variances of the steel rods supplied by the two companies are not equal, i.e., σ₁² ≠ σ₂². Show more…

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In a study, steel rods supplied by two different companies were compared. Springs were made out of the steel rod supplied by each company, and the "bounciness" was studied. Company A 9.3 8.8 6.8 8.7 8.5 6.7 8.0 8.8 6.5 9.2 7.0 Company B 11.0 9.8 9.9 10.2 10.1 9.7 11.0 11.1 10.2 10.2 9.6 On 0.10 level of significance, can we conclude that the population variances in the steel rods supplied by these companies are equal? Assume both population are approximately normal. Show all your work.

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