Question

A publisher reports that 37% of their readers own a laptop. A marketing executive wants to test the claim that the percentage is actually different from the reported percentage. A random sample of 350 found that 30% of the readers owned a laptop. Find the value of the test statistic. Round your answer to two decimal places.

Answer 1

p(s) = - 2.71

Explanation:

Test of proportion

sample size n = 350

Publisher report 37 % 0,37

Sample proportion 30 % 0.30

p(s) = [ ( p - p₀ ) /√(p₀q₀/n ] ⇒ p(s) = - 0.07*(18.70)/√(0.37)*(0.63)

p(s) = - 1.3095/0.4828

p(s) = - 2.71