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Issue:

Miscellaneous

 

Written by:

Tricia H

 

Date added:

October 1, 2015

 

Level:

University

 

Grade:

A

 

No of pages / words:

5 / 1254

 

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6450 times

 

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A random sample of 10 days (n = 10) is drawn and the data representing the number of cars is analyzed. The Data Desk tool in ActivStats reports that the sample mean is 989.8 cars (sample mean: y = 989.8) and the sample standard deviation is 160.676 cars (s = 160.676). In order to determine whether the peak-hour pricing has contributed for reducing the number of cars using the tunnel, we have to assume that the numerical data are independently drawn and represent a random sample from a population that is normally distributed...
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Therefore, as the sampling distribution of the mean is normally distributed and the population standard deviation (s) is not known, it is appropriate to use the t-test. The null and the alternative hypothesis for this test are: Ho: m=1220 (or less) and Ha: m > 1220. For this problem we can use 1% level of significance (a = 0...
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