Quality control personnel at a cookie factory are looking at the weights of boxes of cookies. The boxes are supposed to weigh 1 pound. They select every hundredth box of cookies and weigh the contents. This procedure results in a sample that can be considered to be representative of the population of all boxes of cookies made at this factory on this day. The resulting net weights (pounds) of cookies comprise the sample of weights from 12 boxes:

1.038 1.012 1.008 1.004 0.997 0.998 1.012 0.997 1.004 0.999 1.000 1.006

Which of the following is/are true? (Please choose all that apply.)

A. A t test will not be valid because the tallest bar in the histogram is at the extreme left, suggesting that the population of weights is skewed.

B. A t test will be valid because the sample is representative of the populationof all boxes of cookies made at this factory

C. A t test may not be accurate becausethe tallest bar in the histogram is at the extreme left, suggesting that the population of weights is skewed.

D. A t test will not be valid because the sample is too small.

E. A t test will not be valid because there's an outlier

F. A t test may not be accurate because there's an outlier

*more then one answer is correct^**