R Instructions: Hypothesis Testing for the Population Proportion p

To conduct the z-test for the population proportion (p) using R, enter the commands:

p = prop.test(40,316,0.035,alternative="greater",conf.level=0.95, correct=FALSE); p Z = sqrt(p$statistic); Z

Note: Using R—the command prop.test returns X2 = 78.9, and it turns out that X2 = z2. Since the sample proportion p is larger than the hypothesized proportion p0, we know that Z is positive. Thus


The value of X2 is recovered with the command p$statistic.