Independent sample t test
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The average mpg usage for a 2004 Ford Expedition 2WD for a sample of 10 tanks of gas was 17.0 with the standard deviation of 0.8. For a Ford Explorer 2WD, the average mpg usage for a sample of 10 tanks of gas was 18.5 with a standard deviation of 1.0. (a) Assuming equal variances, at a (alpha) = .01. is the true mean mpg lower for the Ford Expedition? (b) Calculate p-value using Excel.
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The step by step method for testing the hypothesis under 5 step approach is discussed here. Excel template for each problem is also included. This template can be used to obtain the answers of similar problems.
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P-value and standard deviation
The average mpg usage for a 2004 Ford Expedition 2WD for a sample of 10 tanks of gas was 17.0 with the standard deviation of 0.8. For a Ford Explorer 2WD, the average mpg usage for a sample of 10 tanks of gas was 18.5 with a standard deviation of 1.0.
(a) Assuming equal variances, at a (alpha) = .01. is the true mean mpg lower for the Ford Expedition?
(b) Calculate ...
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