Of 150 adults who tried a new peach-flavoured peppermint patty, 75 rated it excellent. Of 200 children sampled, 123 rated it excellent. Using the 0.10 level of significance, can we conclude that there is a significant difference in the proportion of adults and the proportion of children who rate the new flavour as excellent? State the decision rule, the value of the test statistic, and your decision. A) Reject if z 1.645, z = -0.66, no difference. B) Reject if z 1.645 or 1.96 or 1.96 or 1.645 or

Question

Of 150 adults who tried a new peach-flavoured peppermint patty, 75 rated it excellent. Of 200 children sampled, 123 rated it excellent. Using the 0.10 level of significance, can we conclude that there is a significant difference in the proportion of adults and the proportion of children who rate the new flavour as excellent? State the decision rule, the value of the test statistic, and your decision. A) Reject if z > 1.645, z = -0.66, no difference. B) Reject if z > 1.645 or < -1.645, z = -5.28, difference exists. C) Reject if z > 1.96 or < -1.96, z = -2.15 no difference. D) Reject if z > 1.96 or < -1.96, z = -2.26, difference exists. E) Reject if z > 1.645 or < -1.645, z = -2.15, difference exists.

Quizplus · Accepted Answer

The test statistic z = -2.15 falls outside the range of -1.645 to 1.645, leading to the rejection of the null hypothesis, indicating a significant difference in the proportions.

Of 150 Adults Who Tried a New Peach-Flavoured Peppermint Patty