Examine the relationship between two variables
Give an example of how you may use a correlation or simple regression to examine the relationship between two variables in your area of interest. State the null and alternative hypothesis and clearly define your variables.
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Test the significance of the correlation coefficient r at a = 0.05 for the data below.
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A study of commuting times reports the travel times to work of a random sample of 18 employed adults in New York State. The mean is x= 25.46 minutes and the standard deviation is s = 20.8 minutes.
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