Two phone batteries are to be tested for how they last (i.e., lifetime). Phone battery A has a lifetime that is normally distributed with mean 4.1 and standard deviation 1.6. Phone battery B has a lifetime that is normally distributed withmean 3.7 and standard deviation 1.5. Suppose that 100 batteries of each kind are tested. Hint: for this problem, you may find your notes from chapter 5 and 6 useful.(a) By the Central Limit Theorem, A is normally distributed with mean(b) By the Central Limit Theorem, B is normally distributed with mean(c) By the Central Limit Theorem, A - B is normally distributed with mean(d) Calculate P(A - B > 0.36)and standard deviationand standard deviationand standard deviation

Phone battery A has a lifetime is normally distributed with mean 4.1 and standard deviation…

Answered: Two phone batteries are to be tested…

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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suppose that a category of world-class runners are known to run a marathon (26 miles) in an average of 143 minutes with a standard deviation of 14 minutes. consider 49 of the races. Let x̅ = the average of the 49 races. I need help finding the median of the average running times. if someone could explain how to solve this problem that would be great
4. A very large population has a mean of 180 and a standard deviation of 24. One day a sample of 64 observations is taken. On another day a sample of 100 observations is taken. Which of the following is true? The standard error of the mean will be smaller with 64 observations. It is impossible to determine any of the above given the available information. The standard error of the mean will be larger with 64 observations. The standard error of the mean will be the same with either 64 or 100 observations.
a distribution with a mean of u=41 and a standard deviation of 4 is transformed into a standardized distribution with a mean of u=100 and a standardized deviation =20, find the new standardized score for each of the following values from the original population, x=39, x=36, x=45, x=50
13)Many graduate schools require applicants to take the GRE for admission. The mean GRE score worldwide is 149.7 with a standard deviation of 8.2. The recommended overall GRE score for admission at UC Berkeley is 153 Q) If an applicant were to obtain a score of 123, how many standard deviations away is this score from the mean?
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No need for explanation
Chapter 10 7)The concentration of benzene was measured in units of milligrams per liter for a simple random sample of five specimens of untreated wastewater produced at a gas field. The sample mean was 7.5 with a sample standard deviation of 1.7. Seven specimens of treated wastewater had an average benzene concentration of 3.3 with a standard deviation of 1.6. It is reasonable to assume that both samples come from populations that are approximately normal. Construct an 80 % confidence interval for the reduction in benzene concentration after treatment. Round the final answer to one decimal place. SEARE E itel H mm

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