120 field mice are weighed. The average weight of a mouse is 225 grams and the sample standard deviation is 15.1 grams.

-Refer to Exhibit 12.6. The conclusion is:
A) The mean weight of a field mouse is greater than 235 grams.
B) The mean weight of a field mouse is less than 235 grams.
C) Estimate a point mean of 235 grams.
D) The mean weight of a field mouse is less than 225 grams.
E) None of the above are correct.

Question

120 field mice are weighed. The average weight of a mouse is 225 grams and the sample standard deviation is 15.1 grams.

-Refer to Exhibit 12.6. The conclusion is:
A) The mean weight of a field mouse is greater than 235 grams.
B) The mean weight of a field mouse is less than 235 grams.
C) Estimate a point mean of 235 grams.
D) The mean weight of a field mouse is less than 225 grams.
E) None of the above are correct.

Quizplus · Accepted Answer

Since the average weight of a mouse is 225 grams and the sample standard deviation is 15.1 grams, it is possible that the true mean weight of a field mouse is less than 235 grams. Therefore, option B is the best choice. Option A is incorrect because the conclusion is not about whether the mean weight is greater than a certain value. Option C is incorrect because there is no reason to estimate a point mean of 235 grams. Option D is incorrect because the average weight of the field mice is given to be 225 grams. Option E is incorrect because option B is a valid conclusion.

120 Field Mice Are Weighed