Please solve the screenshot and show/explain the steps, thanks! On the basis of extensive tests, the yield point of a particular type of mild steel-reinforcing bar is known to be normally distributed with o = 100. The composition of the bar has been slightly modified, but the modification is not believed to have affected either thenormality or the value of o.(a) Assuming this to be the case, if a sample of 49 modified bars resulted in a sample average yield point of 8438 Ib, compute a 90% CI for the true average yield point of the modified bar. (Round your answers to one decimal place.)Ib(b) How would you modify the interval in part (a) to obtain a confidence level of 94%? (Round your answer to two decimal places.)The value of zshould be changed to

(a) Given that, Population standard deviation σ=100 Sample size n=49 Sample average yield point…

On the basis of extensive tests, the yield point of a particular type of mild steel-reinforcing bar is known to be normally distributed with o = 100. The composition of the bar has been slightly modified, but the modification is not believed to have affected either the normality or the value of a. (a) Assuming this to be the case, if a sample of 49 modified bars resulted in a sample average yield point of 8438 Ib, compute a 90% CI for the true average yield point of the modified bar. (Round your answers to one decimal place.) ) Ib (b) How would you modify the interval in part (a) to obtain a confidence level of 94%? (Round your answer to two decimal places.) The value of z vv should be changed to

On the basis of extensive tests, the yield point of a particular type of mild steel-reinforcing bar is known to be normally distributed with o = 100. The composition of the bar has been slightly modified, but the modification is not believed to have affected either the normality or the value of a. (a) Assuming this to be the case, if a sample of 49 modified bars resulted in a sample average yield point of 8438 Ib, compute a 90% CI for the true average yield point of the modified bar. (Round your answers to one decimal place.) ) Ib (b) How would you modify the interval in part (a) to obtain a confidence level of 94%? (Round your answer to two decimal places.) The value of z vv should be changed to

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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