A customer suspects that one brand of cereal does not fill its boxes with the weight that is printed on the box. He
decides to weigh several boxes to test his theory.
Which of these methods will produce the most representative
sample of the population of boxes containing this brand of cereal?
O A. The customer randomly selects one grocery store, weighs
one case of the cereal, and uses this weight to estimate
the weight per box
O B. The customer randomly selects four grocery stores and
weighs two boxes from each selected store.
C. The customer randomly selects one grocery store and
weighs half the boxes of cereal.
D. The customer randomly selects one grocery store and
weighs all the cereal boxes on one shelf

Atest of sobriety involves measuring the subject's motor skills. a sample of 31 randomly selected sober subjects take the test and produce a mean score of 64.4 with a standard deviation of 2. a claim is made that the true mean score for all sober subjects is equal to 65. for each part below, enter only a numeric value in the answer box. for example, do not type "z =" or "t =" before your answers. round each of your answers to 3 places after the decimal point. (a) calculate the value of the test statistic used in this test. test statistic's value = (b) use your calculator to find the p-value of this test. p-value = (c) use your calculator to find the critical value(s) used to test this claim at the 0.2 significance level. if there are two critical values, then list them both with a comma between them. critical value(s) =