A research firm carried out a hypothesis test on a population proportion using a left-tailed alternative hypothesis. Which of the following z-scores would be associated with a p-value of $0.04$ ? Round to the nearest hundredth.
A) $z = 2.50$
B) $z = - 2.50$
C) $\mathrm { z } = - 1.75$
D) $z = 1.75$

Question

Quizplus · Accepted Answer

A left-tailed test with a p-value of 0.04 corresponds to a z-score where the cumulative probability is 0.04. This is approximately $z = -1.75$.

A Research Firm Carried Out a Hypothesis Test on a Population