Exhibit 19.6 120 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 19.6.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

Quizplus · Accepted Answer

As the sample mean weight of the 120 field mice is given as 225 grams and the sample standard deviation is 15.1 grams, we can construct a confidence interval with a level of significance and estimate the population mean weight. However, as there is no information on the level of significance or the confidence interval, we cannot estimate a point mean of 235 grams. As the alternative hypothesis is that the mean weight is less than 235 grams, the conclusion is that the mean weight of a field mouse is less than 235 grams. Therefore, option B is the best choice.