A random sample of 510 observations produced a sample proportion equal to 0.33. Find the critical and observed values of z for the following test of hypotheses using α = 0.01 . H 0 :   p = 0.30 versus H 1 :   p ≠ 0.30 . Round your answers to two decimal places. zcritical left =Enter your answer; z_critical left  zcritical right =Enter your answer; z_critical right  zobserved =Enter your answer; z_observed

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