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Math 246 Project 10 Sample KEY

# Math 246 Project 10 Sample KEY - KEY Project 10 Chapter Ten...

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KEY Project 10 Chapter Ten: Hypothesis Testing A. Recently a friend of mine claimed that the summer of 2000 in Houston, Texas, was hotter than usual. To test this claim I went to AccuWeather.com and randomly selected 12 days in the summer of 2000. I recorded the departure from normal temperature, with positive values indicating above-normal temperatures and negative values indicating below-normal temperatures (see below). 4 -1 0 2 2 4 -1 -3 -1 0 2 4 Test the hypothesis, at the α = 0.05 level of significance. .(May use MINITAB) 1.) Define the parameter(s) of interest. The parameter of interest is μ which is the mean number of days hotter than normal. 2.) State the null : ______ μ = 0__________________________ State the Alternative : _____ μ > 0_____________________ 3.) State assumptions, verifications, etc The Anderson-Darling Goodness-of-Fit Normality Test p-value = .204 which is greater than 0.05; therefore, the sampled population is approximately Normal. We are dealing with a Student’s t-distribution with n-1 degrees of freedom.

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4 2 0 -2 Median Mean 4 3 2 1 0 -1 1st Quartile -1.0000 Median 1.0000 3rd Quartile 3.5000
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Math 246 Project 10 Sample KEY - KEY Project 10 Chapter Ten...

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