Lifetimes of Wristwatches A random sample of the lifetimes of 30 inexpensive wristwatches has a standard deviation of 4.5months. Assúme the variable is normally distributed. Use the chi-square distribution table to find any chi-square values to threedecimal places. Round your final answers to one decimal place.Part: 0/ 2Part 1 of 2Find the 99% confidence intervals for the variance and standard deviation.

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Answered: Lifetimes of Wristwatches A random…

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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Breaking Strength of Cable A special cable has a breaking strength of 800 pounds. The standard deviation of the population is 12 pounds. A researcher selects a sample of 23 cables and finds that the average breaking strength is 793 pounds. Can he reject the claim that the breaking strength is 800 pounds? Use the P-value method with a 0.05 level of significance. Assume that the variable is normally distributed. Use a graphing calculator. Part: 0/4 Part 1 of 4 (a) State the hypotheses and Identify the claim. Ho (Choose one) H₂: (Choose one) This hypothesis test is a (Choose one) test. 000-0 H G 民留〗f g E
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