Use the following to answer the question(s) below.
A newspaper poll asked respondents if they trusted "eco friendly" labels on cleaning products. Out of 1000 adults surveyed, 498 responded "yes." We would like to test if the proportion of respondents that trust these labels is at least 50%.
-The calculated test statistic value is
A) -0.126.
B) -2.45.
C) 1.27.
D) -1.89.
E) 0.139.

Question

Quizplus · Accepted Answer

The test statistic value is calculated using the formula for a proportion test. Given that the sample proportion is very close to the hypothesized proportion (498 out of 1000 is 49.8%, very close to 50%), the test statistic is expected to be small. A value of -0.126 indicates a very small difference between the sample proportion and the hypothesized proportion, making it the correct choice.

Use the Following to Answer the Question(s) Below