According to the law of large numbers, as more observations are added to the sample, the difference between the sample mean and the population mean
A) Tends to become smaller B) Tends to become larger
C) Remains about the same D) Is inversely affected by the data added
Q. 2Assume that blood pressure readings are normally distributed with a mean of 122 and a standard deviation of 6.4. If 64 people are randomly selected, find the probability that their mean blood pressure will be less than 124.
A) 0.9938 B) 0.0062 C) 0.9998 D) 0.8615
Q. 3The heights of ten male students (in inches) in a college biology class are listed below. Find the mean. 71 67 67 72 76 72 73 68 72 72
A) 71 inches B) 67 inches C) 68 inches D) 72 inches
Q. 4Assume that the heights of men are normally distributed with a mean of 70.7 inches and a standard deviation of 2.8 inches. If 64 men are randomly selected, find the probability that they have a mean height greater than 71.7 inches.
A) 0.0021 B) 0.0210 C) 0.9005 D) 0.9979
Q. 5True or False: 0 = 1
A) True B) False
Q. 6Furnace repair bills are normally distributed with a mean of 267 dollars and a standard deviation of 20 dollars. If 64 of these repair bills are randomly selected, find the probability that they have a mean cost between 267 dollars and 269 dollars.
A) 0.2881 B) 0.7881 C) 0.2119 D) 0.5517
Q. 7The heights of ten female students (in inches) in a college math class are listed below. Find the mean. 65 66 67 66 67 70 67 70 71 68
A) 67.7 inches B) 65.5 inches C) 71.1 inches D) 70.0 inches
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