ABC Incorporated asked a sample of residents in each of two cities to indicate the brand of shampoo most preferred by them.They found that 40 percent of the people in City 1 preferred Brand A, as compared with 30 percent in City 2.The results indicate that 1-Brand A is more popular with the sample respondents in City 1. 2-Brand A is more popular with the residents in City 1. 3-a hypothesis test of the significance of the difference in sample percentages is needed before any conclusions about differences in population can be made.
A)1
B)2
C)3
D)1 and 3
E)1 and 2

Question

Quizplus · Accepted Answer

The sample results show that Brand A is more popular among the sample respondents in City 1 (statement 1). However, to make conclusions about the entire population, a hypothesis test is needed to determine if the observed difference is statistically significant (statement 3).

ABC Incorporated Asked a Sample of Residents in Each of Two