Answered: At least one of the answers above is…

Holt Mcdougal Larson Pre-algebra: Student Edition 2012

1st Edition

ISBN:9780547587776

Author:HOLT MCDOUGAL

Publisher:HOLT MCDOUGAL

Chapter11: Data Analysis And Probability

Section: Chapter Questions

Problem 2CST

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The answer is NOT 3.1 and 15.95. I have already used one of my questions on this same problem and was given the same answers I have in the photo that show these numbers are not the right answers.

Transcribed Image Text:At least one of the answers above is NOT correct. For each situation, state the null and alternative hypotheses: (Type "mu" for the symbol μ, e.g. mu the mean is not equal to 1. Please do not include units such as "mm" or "$" in your answer.) 1 for the mean is greater than 1, mu< 1 for the mean is less than 1, mu not = 1 for (a) The diameter of a spindle in a small motor is supposed to be 3.1 millimeters (mm) with a standard deviation of 0.1 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 53 spindles to determine whether the mean diameter has moved away from the required measurement. Suppose the sample has an average diameter of 3.24 mm. Ho: 3.1 Ha 3.1 (b) Harry thinks that prices in Caldwell, Idaho, are higher than the rest of the country. He reads that the nationwide average price of a certain brand of laundry detergent is $15.95 with standard deviation $0.70. He takes a sample from 30 local Caldwell stores and finds the average price for this same brand of detergent is $18.05. Ho: 15.95 Ha: 15.95

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