Two different hardening processes, (1) saltwater quenching and (2) oil quenching, are usedon samples of a particular type of metal alloy. The results are given below:-Saltwater Quench145150153148141152146154139148Oil Quench152150147155140146158152151143For the above data set calculate the following confidence intervals:(i) 95% confidence interval for the population mean of the saltwater quench.(ii) 95% confidence interval for the population standard deviation for the saltwaterquench.(iii) 95% confidence interval for the population ratio of variances(iv) 95% confidence interval for the difference in population meansFor each confidence interval, interpret the result in the context of the original problem forwhich the data set was collected.

Salt water QuenchOil Quench145152150150153147148155141140152146146158154152139151148143

Answered: Two different hardening processes, (1)…

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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Given two independent random samples with the following results: n₂ = 8 x₂ = 124 $2 = 28 = 16 n₁ x₁ = 94 $1 = 16 Use this data to find the 90 % confidence interval for the true difference between the population means. Assume that the population variances are equal and that the two populations are normally distributed. Copy Data Step 1 of 3: Find the point estimate that should be used in constructing the confidence interval.
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A study compared tooth health and periodontal damage in a group of 40 young adult males with a tongue piercing and a control group of 50 young adult males without tongue piercing. Here are the summary statistics: Group Sample size Mean of enamel cracks StDev of enamel cracks Tongue piercing 40 4.1 3.7 No Tongue piercing 50 1.3 1.6 For the Tongue Piercing Group, find a 95% confidence interval for the mean of enamel cracks of young adult males with a tongue piercing. Interpret your interval with the context. Which method will you use here to find you interval? 1-sample T interval 2-sample T interval 2-sample Z test. 2-proportion Z test Interpret your interval with the context.
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