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A random sample of 124 observations produced a sample mean of 33. Find the critical and observed values of z for the following test of

A random sample of 124 observations produced a sample mean of 33. Find the critical and observed values of z for the following test of hypothesis using =0.025. The population standard deviation is known to be 5 and the population distribution is normal.

H0:=28 versus H1:>28.

Round your answers to two decimal places.

zcritical =

zobserved =

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