QUESTION 41
Use the following scenario and data for questions 41 to
45:
The distribution of weights of cereal boxes filled in a production
line is unknown. However, the mean is u=15.60 OZs and the standard
deviation is 0.2200 OZs. To check if the weights of the cereal
boxes meet specifications, a random sample of n=64 boxes is
selected. Use X to denote the sample mean.
The mean (or expected value) of the sample mean X is:
15.0000 |
||
15.4400 |
||
15.8800 |
||
15.7600 |
||
none of the above |
The standard deviation of the sample mean X is
0.0220 |
||
0.0275 |
||
0.0800 |
||
0.6400 |
||
none of the above |
The probability that the sample mean X is less than or equal to 15.58 OZs is closest to
0.2327 |
||
0.2673 |
||
0.7273 |
||
0.7673 |
||
none of the above |
The probability that the sample mean X is less than or equal to 15.63 OZs is closest to
0.1379 |
||
0.3621 |
||
0.8621 |
||
1.0909 |
||
none of the above |
The probability that the sample mean X is between 15.55 and 15.58 OZs is closest to
0.7329 |
||
0.4656 |
||
0.2673 |
||
0.1983 |
||
none of the above |
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