Nationwide Insurance would like to perform a chi- square test to investigate whether a difference exists in the proportion of male and female teenagers who text while they drive. A random sample of 80 male teenagers found that 50 indicated they texted while driving. A random sample of 120 female teenagers found that 65 indicated they texted while driving. The expected frequency of male teenagers who text is _______.

Question

Quizplus · Accepted Answer

To find the expected frequency of male teenagers who text while driving, we first calculate the total number of teenagers surveyed (80 males + 120 females = 200) and the total number who text while driving (50 males + 65 females = 115). The expected frequency is calculated by multiplying the total number of males by the proportion of teenagers who text while driving (115/200). So, for males, it's (80/200) * 115 = 46.

Nationwide Insurance Would Like to Perform a Chi- Square Test