KThe standard deviation in the pressure required to open a certain valve is known to be a = 1.4 psi. Due to changes in the manufacturing process, the quality-control manager feels that the pressurevariability has been reduced.(a) State the null hypothesis in words. Choose the correct answer below.OA. The standard deviation in the pressure required to open a certain valve is greater than 1.4 psi.OB. The standard deviation in the pressure required to open a certain valve is 1.4 psi.OC. The standard deviation in the pressure required to open a certain valve is different from 1.4 psi.OD. The standard deviation in the pressure required to open any valve is 1.4 psi.State the alternative hypothesis in words. Choose the correct answer below.OA. The standard deviation in the pressure required to open a certain valve is 1.4 psi.OB. The standard deviation in the pressure required to open a certain valve is different from 1.4 psi.OC. The standard deviation in the pressure required to open any valve is 1.4 psi.O D. The standard deviation in the pressure required to open a certain valve is less than 1.4 psi.(b) State the hypotheses symbolically.Ho:psiH₁:psi▼(Type integers or decimals. Do not round.)(c) What would it mean to make a Type I error?YThe managerthe hypothesis that the pressure variability is(Type integers or decimals. Do not round.)(d) What would it mean to make a Type II error?The managerthe hypothesis that the pressure variability is(Type integers or decimals. Do not round.)psi, when the true pressure variability ispsi, when the true pressure variability ispsi.psi.

The standard deviation in the pressure required to open a certain value is known to be psi. The…

Answered: OD. The standard deviation in the…

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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A popular theory is that presidential candidates have an advantage if they are taller than their main opponents. Listed are heights (in centimeters) of randomly selected presidents along with the heights of their main opponents. Complete parts (a) and (b) below. 191 175 173 191 190 175 181 165 184 193 185 Height (cm) of President Height (cm) of Main Opponent 178 C... Since the P-value is greater than the significance level, fail to reject the null hypothesis. There is not sufficient evidence to support the claim that presidents tend to be taller than their opponents. b. Construct the confidence interval that could be used for the hypothesis test described in part (a). What feature of the confidence interval leads to the same conclusion reached in part (a)? The confidence interval is cm<< cm. (Round to one decimal place as needed.) What feature of the confidence interval leads to the same conclusion reached in part (a)? Since the confidence interval contains zero fail to reiect the null…

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