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Estimate the p-value. (Round your answer to 4 decimal places.)

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Apr 8th, 2015

xbar = 2172.444

mu =2160

s= 9.382312

z= (xbar-mu)*sqrt(9)/s = 12.444*3/9.382312= 3.979 = 3.98

P( Z> 3.98)= 0.00003

p value = 0.00003 < 0.025

Hence we reject the null hypothesis. 

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Apr 8th, 2015

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