50.130.420.987.731.114.296.54.636.32.599.11.842.611.584.984.66.288.63210.7 Thirty units were placed on test until 20 failures were observed. The failure times in thespreadsheet were obtained in accelerated test hours.a. Find the maximum likelihood estimates of the rate parameter assuming that these dataare exponentially distributed.b. Using the parameter in part a, use the basic Pearson goodness-of-fit test to determine ifan exponential distribution is indeed a good fit assuming 95% confidence.c. What's the probability that failure in this unit will occur before 65 hours?

The data on 20 failure units are given below.Sr no failure time…

Answered: Thirty units were placed on test until…

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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Executives of a supermarket chain are interested in the amount of time that customers spend in the stores during shopping trips. The executives hire a statistical consultant and ask her to determine the mean shopping time, μ, of customers at the supermarkets. The consultant will collect a random sample of shopping times at the supermarkets and use the mean of these shopping times to estimate μ. Assuming that the standard deviation of the population of shopping times at the supermarkets is 26 minutes, what is the minimum sample size she must collect in order for her to be 90%confident that her estimate is within 5 minutes of μ? Carry your intermediate computations to at least three decimal places. Write your answer as a whole number (and make sure that it is the minimum whole number that satisfies the requirements).
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Executives of a supermarket chain are interested in the amount of time that customers spend in the stores during shopping trips. The executives hire a statistical consultant and ask her to determine the mean shopping time, μ, of customers at the supermarkets. The consultant will collect a random sample of shopping times at the supermarkets and use the mean of these shopping times to estimate μ. Assuming that the standard deviation of the population of shopping times at the supermarkets is 27 minutes, what is the minimum sample size she must collect in order for her to be 95% confident that her estimate is within 5 minutes of μ? Carry your intermediate computations to at least three decimal places. Write your answer as a whole number (and make sure that it is the minimum whole number that satisfies the requirements).
interpret the short-run elasticity and long-run elasticies.

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