Standard deviation of all sams games

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The Youtube video discussed whether we should beleive Sams claim that his bowling average is (at least) 150, despite the fact that he averaged 40 in his three game with you. Lets assume that the standard deviation of all Sams games is 75. At the 0.05 level of significance, should anyone accept Sams claim? What if his standard deviation is 125?

H0:

H1: (which one is the clasim)

u=

n=

x(overbar)=

σ=

a=

Since σ is known, the test statistic is: z=x-u divided by σ

Reference no: EM132344099

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