2. A 95% confidence interval for the MEAN recovery time after a certain major surgery is(100, 130) days.a) Find the sample mean used to form the interval.b) Find the margin of error.c) Assume that the population standard deviation is 40. Determine the sample size neededto create the confidence interval (110, 130) with the margin of error you found in part b.

The formula of sample mean using the confidence limits is,Where,UL denotes the upper confidence…

Answered: 2. A 95% confidence interval for 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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Select the correct answer below: p-value>0.10 0.05< p-value <0.10 0.01< p-value <0.05 p-value <0.01
To compare the dry braking distances from 30 to 0 miles per hour for two makes of automobiles, a safety engineer conducts braking tests for 35 models of Make A and 35 models of Make B. The mean braking distance for Make A is 42 feet. Assume the population standard deviation is 4.7 feet. The mean braking distance for Make B is 45 feet. Assume the population standard deviation is 4.4 feet. At a = 0.10, can the engineer support the claim that the mean braking distances are different for the two makes of automobiles? Assume the samples are random and independent, and the populations are normally distributed. Complete parts (a) rari rz (b) Find the critical value(s) and identify the rejection region(s). The critical value(s) is/are (Round to three decimal places as needed. Use a comma to separate answers as needed.)
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