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Conceptual Questions  Supplement to HW4
1. A subset of a population selected to represent the population is
a.
a subset
b.
a sample
c.
a small population
d.
None of the above answers is correct.
ANSWER:
b
2. The purpose of statistical inference is to provide information about the
a.
sample based upon information contained in the population
b.
population based upon information contained in the sample
c.
population based upon information contained in the population
d.
mean of the sample based upon the mean of the population
e.
None of the above answers is correct.
ANSWER:
b
3. The probability distribution of all possible values of the sample mean
x is
a.
the probability density function of
x
b.
the sampling distribution of
x
c.
the grand mean, since it considers all possible values of the sample mean
d.
one, since it considers all possible values of the sample mean
e.
None of the above answers is correct.
ANSWER:
b
4. The point estimator with the smaller variance is said to have
a.
smaller relative efficiency
b.
greater relative efficiency
c.
smaller relative consistency
b.
greater relative consistency
e.
None of the above answers is correct.
ANSWER:
b
5. Since the sample size is always smaller than the size of the population, the sample
mean must
a.
always be smaller than the population mean
b.
be larger than the population mean
c.
be equal to the population mean
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be zero
e.
None of the above answers is correct.
ANSWER:
e
6. In point estimation
a.
data from the population is used to estimate the population parameter
b.
data from the sample is used to estimate the population parameter
c.
data from the sample is used to estimate the sample statistic
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 Spring '10
 Elkamel

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