Maurice Tutor

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Teaching Since: May 2017
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  • MCS,PHD
    Argosy University/ Phoniex University/
    Nov-2005 - Oct-2011

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  • Professor
    Phoniex University
    Oct-2001 - Nov-2016

Category > Management Posted 22 Jan 2018 My Price 7.00

number of mileage measurements


In Practice Problem 12.2, we presented esting a new gasoline additive. A large number of mileage measurements on the gasoline without the additive showed a mean of 24.7 miles per gallon and a standard deviation of 4.8. An experiment was performed in which 75 cars were tested using the gasoline plus the additive. The results showed a sample mean of 26.5 miles per gallon. To evaluate these data, a directional test with a = 0.051 tail was used. Suppose that before doing the experiment, the manufacturer wants to determine the probability that he will be able to detect a real mean increase of 2.0 miles per gallon with the additive if the additive is at least that effective. a. If he tests 20 cars, what is the power to detect a mean increase of 2.0 miles per gallon? b. If he increases the N to 75 cars, what is the power to detect a mean increase of 2.0 miles per gallon? c. How many cars should he use if he wants to have a 99% chance of detecting a mean increase of 2.0 miles per gallon? I/O

 

Problem 12.2

Why is the sampling distribution of a statistic important to be able to use the statistic in hypothesis testing? Explain in a short paragraph.

 

Answers

Maurice Tutor
(5)
Status NEW Posted 22 Jan 2018 08:01 PM My Price 7.00

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