In a 2019 Quinnipiac University poll of registered voters, 58% oppose making all U.S public colleges free. The Glangariff Group in Michigan collected data from 610 voters, where 375 support a taxpayer-funded free college program. Calculate the value of the test statistic.
A) 1.38
B) 1.74
C) 11.31
D) 1.33

Question

Quizplus · Accepted Answer

The test statistic is calculated using the formula for a proportion z-test: z = (p̂ - p0) / √(p0(1-p0)/n), where p̂ is the sample proportion, p0 is the population proportion, and n is the sample size. Here, p̂ = 375/610, p0 = 0.42 (since 58% oppose, 42% support), and n = 610. Plugging these values into the formula gives a z-value of approximately 1.74.

In a 2019 Quinnipiac University Poll of Registered Voters, 58