2. A paint manufacturing company claims that the mean drying time for itspaints is not longer than 45 minutes. A random sample of 20 gallons of paintsselected from the production line of this company showed that the mean dryingtime for this sample is 49.50 minutes with a standard deviation of 3 minutes.Assume that the drying times for these paints have a normal distribution.At a 1% significance level, would you conclude that the company's claim is true?Use the Critical Value Approach.

step.1 the null and alternative hypothesis ;- Claim to be tested is mean is no longer than 45 min.…

Answered: 2. A paint manufacturing company claims…

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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You are the manager of a restaurant that delivers pizza to college dormitory rooms. You have just changed your delivery process in an effort to reduce the mean time between the order and completion of delivery from the current 25 minutes. A sample of 36 orders using the new delivery process yields a sample mean of 22.4 minutes and a sample standard deviation of 6 minutes. Perform a hypothesis test to determine if there’s evidence that the population mean delivery time has been reduced below the previous population mean value of 25 minutes by answering the following questions: (a) What are the null and alternate hypotheses for this test? (b) What is the value of the test statistic for this test? (c) Using the critical value approach, at the 0.05 level of significance, what is the decision rule? (d) What is your conclusion in context of the problem? (Answer this question in a complete sentence(s) and include why, referring to the decision rule.) (e) Using the p-value approach, at the…
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