A company believes that it controls more than 30% of the total market share for one of its products.To prove this belief, a random sample of 144 purchases of this product is contacted.It is found that 50 of the 144 purchases were of this company's brand.If a researcher wants to conduct a statistical test for this problem, the test would be _______.
A)a one-tailed test
B)a two-tailed test
C)an alpha test
D)a finite population test
E)a finite sample test

Question

Quizplus · Accepted Answer

The correct choice is a one-tailed test because the company is interested in proving that it controls more than 30% of the market share, which is a directional hypothesis.

A Company Believes That It Controls More Than 30% of the Total