Answered: For each situation, state the null and…

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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For each situation, state the null and alternative hypotheses: (Type "mu" for the symbol μ , e.g. mu > 1 for the mean is greater than 1, mu < 1 for the mean is less than 1, mu not = 1 for the mean is not equal to 1. Please do not include units such as "mm" or "$" in your answer.)

Transcribed Image Text:your answer.) (a) The diameter of a spindle in a small motor is supposed to be 4.9 millimeters (mm) with a standard deviation of 0.14 mm. If the spindle is either too small or too large, the motor will not work properly. The manufacturer measures the diameter in a sample of 8 spindles to determine whether the mean diameter has moved away from the required measurement. Suppose the sample has an average diameter of 5.03 mm. Ho : Ha: T (b) Harry thinks that prices in Caldwell are lower than the rest of the country. He reads that the nationwide average price of a certain brand of laundry detergent is $24.65 with standard deviation $1.94. He takes a sample from 3 local Caldwell stores and finds the average price for this same brand of detergent is $25.44. Ho : Ha: —

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