A random sample of 420 observations produced a sample proportion equal to 0.32. Find the critical and observed values of z for the following test of hypotheses using α = 0.1. Ho: p = 0.30 versus H1: p ≠ 0.30. Round your answers to two decimal places. Zcritical left = Zcritical right = Zobserved
Added by Paul K.
Step 1
Standard error (SE) = sqrt((p*(1-p))/n) SE = sqrt((0.32*(1-0.32))/420) SE = sqrt((0.32*0.68)/420) SE = sqrt(0.2176/420) SE = sqrt(0.0005181) SE = 0.02277 Show more…
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