QUESTION: 37

A population of size 1,000,000 has mean 42 and standard deviation 6. Sixty random samples, each of size 15 are selected. According to the Central Limit Theorem the distribution of the sixty sample means has a mean of approximately:

42
42/6
42/15
42/ 15
none of the above

Answer(s): A

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QUESTION: 38

A population of size 1,000,000 has mean 42 and standard deviation 6. Sixty random samples, each of size 15 are selected. According to the Central Limit Theorem the distribution of the sixty sample means has a standard deviation of approximately:

6
6/42
6/15
6/ 15
none of the above

Answer(s): D

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QUESTION: 39

A ____ from a sample is used to estimate a population _____. The two words that best fill these blanks are:

item, value
value, statistic
statistic, parameter
parameter, value
parameter, statistic

Answer(s): C

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QUESTION: 40

Deming called the technique of studying a sample to gain understanding of the distribution of a population an “enumerative study.” His main objection to these studies was:

they are too difficult to perform correctly
they require extensive use of computers
they assume a stable distribution
random samples are expensive to obtain
these studies have a high probability of Type II error

Answer(s): C

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