1.
A point estimate is
A.
Always an estimate
population mean.
B.
Always equal to the population value.
C.
An estimate of the population parame
D.
None of the above
The correct answer is c. You
could be estimating a
population proportion or the
population standard deviation
as well as a mean.
2.
A confidence interval
A.
Always includes the
population paramete
B.
Decreases in width as the sample size
C.
Cannot include a value of 0.
D.
None of the above.
The correct answer is b. A
confidence interval can include
any value and you can only
hope it includes the population
parameter.
3.
If we wished to decrease the
width of a confidence interval,
we would do which of the
following?
A.
Increase the size of
the sample.
B.
Reduce the size of the population.
C.
Decrease the level of confidence.
D.
Both A and C.
The correct answer is d. The
width would decrease if you
increased the size of the
sample or reduced the level of
confidence.
4.
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 Spring '10
 BARCUS
 Normal Distribution, Correct Answer, 90 percent, 95 percent, π

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