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 to compare the ratings of adults and children?
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 the ratings of two different groups (adults and children), we need to use a statistical test that compares two sample means. The appropriate test statistic for this scenario would be a z-statistic.

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