Of 250 adults who tried a new multi-grain cereal,"Wow!",187 rated it excellent;of 100 children sampled,66 rated it excellent.What test statistic should we use?
A)z-statistic
B)Right one-tailed test
C)Left one-tailed test
D)Two-tailed test

Question

Quizplus · Accepted Answer

Since we are comparing two proportions (adults vs. children) from two different populations, and we have sample sizes and counts for each group, the appropriate test statistic is the z-statistic.

Of 250 Adults Who Tried a New Multi-Grain Cereal,"Wow!",187 Rated