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Need to know how to calculate the p value A county is cos dering asng the speed lim ton a road because they calm that the mean speed a vehicles is onough ovidanoo to support tha ㆅuntys clair ? Completo parts (a) through (d) bolow. eater than 30 miles per hour. A andor sa ple o 25 vehicles has a mean speedof 31 miles per hour and a standard de at an of 4.9 miles per hour. At α= 001 do you have (a) Write the claim mathermaticaly and identify Ho and Ha Chooee the correct answer below. B. How-30 Ha: μ#30 OD. Ho: μ230 b) Ca culale the standard zed test statisic. 1.02 (Round to two decimal places as needed.) Use technology to calculate the P-value. P-value-(Round to three decimal places as needed)

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Answer #1

As this is an upper tailed test, for n - 1 = 24 degrees of freedom, we get from the t distribution tables that:

P( t24 > 1.02) = 0.159

Therefore 0.159 is the required p-value here.

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