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Solutions Manual For Principles of Biostatistics
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Solutions Manual For Principles of Biostatistics 2nd Edition ByMarcello Pagano , Kimberlee Gauvreau 9781138593145 ALL
Chapters .
Which of the following symbols represents a population parameter?
a. SD
b. s
c. r
d. 0 - ANSWER: B. S
If you drew all possible samples from some population, calculated the mean for each
of the samples, and constructed a line graph (showing the shape of the distribution)
based on all of those means, what would you have?
a. A population distribution
b. A sample distribution
c. A sampling distribution
d. A parameter distribution - ANSWER: c. A sampling distribution
What does it mean when you calculate a 95% confidence interval?
a. The process you used will capture the true parameter 95% of the time in the long
run
b. You can be "95% confident" that your interval will include the population
parameter
c. You can be "5% confident" that your interval will not include the population
parameter
d. All of the above statements are true - ANSWER: d. All of the above statements are
true
What would happen (other things equal) to a confidence interval if you calculated a
99 percent confidence interval rather than a 95 percent confidence interval?
a. It will be narrower
b. It will not change
c. The sample size will increase
d. It will become wider - ANSWER: d. It will become wider
Which of the following statements sounds like a null hypothesis?
a. The coin is not fair
b. There is a correlation in the population
c. There is no difference between male and female incomes in the population
d. The defendant is guilty - ANSWER: c. There is no difference between male and
female incomes in the population
The analysis of variance is a statistical test that is used to compare how many group
means?
a. Three or more
,b. Two or more - ANSWER: b. Two or more
What is the standard deviation of a sampling distribution called?
a. Sampling error
b. Sample error
c. Standard error
d. Simple error - ANSWER: c. Standard error
Hypothesis testing and estimation are the two key branches of the field of inferential
statistics?
a. True
b. False - ANSWER: a. True
A ______ is a subset of a _________.
a. Sample, population
b. Population, sample
c. Statistic, parameter
d. Parameter, statistic - ANSWER: a. Sample, population
A _______ is a numerical characteristic of a sample and a ______ is a numerical
characteristic of a population.
a. Sample, population
b. Population, sample
c. Statistic, parameter
d. Parameter, statistic - ANSWER: c. Statistic, parameter
A sampling distribution might be based on which of the following?
a. Sample means
b. Sample correlations
c. Sample proportions
d. All of the above - ANSWER: d. All of the above
As a general rule, researchers tend to use ____ percent confidence intervals.
a. 99%
b. 95%
c. 50%
d. none of the above - ANSWER: b. 95%
Which of the following is the researcher usually interested in supporting when he or
she is engaging in hypothesis testing?
a. The alternative hypothesis
b. The null hypothesis
c. Both the alternative and null hypothesis
d. Neither the alternative or null hypothesis - ANSWER: a. The alternative hypothesis
, When p<.05 is reported in a journal article that you read for an observed
relationship, it means that the author has rejected the null hypothesis (assuming
that the author is using a significance or alpha level of .05).
a. True
b. False - ANSWER: A. True
When p>05 is reported in a journal article that you read for an observed relationship,
it means that the author has rejected the null hypothesis (assuming that the author
is using a significance or alpha level of .05).
a. True
b. False - ANSWER: b. False
_________ are the values that mark the boundaries of the confidence interval.
a. Confidence intervals
b. Confidence limits
c. Levels of confidence
d. Margin of error - ANSWER: b. Confidence limits
_____ results if you fail to reject the null hypothesis when the null hypothesis is
actually false.
a. Type I error
b. Type II error
c. Type III error
d. Type IV error - ANSWER: b. Type II error
A good way to get a small standard error is to use a ________.
a. Repeated sampling
b. Small sample
c. Large sample
d. Large population - ANSWER: c. Large sample
The car will probably cost about 16,000 dollars; this number sounds more like a(n):
a. Point estimate
b. Interval estimate - ANSWER: a. Point estimate
Identify which of the following steps would not be included in hypothesis testing.
a. State the null and alternative hypotheses
b. Set the significance level before the research study
c. Eliminate all outliers
d. Obtain the probability value using a computer program such as SPSS
e. Compare the probability value to the significance level and make the statistical
decision - ANSWER: c. Eliminate all outliers
. A ________ is a range of numbers inferred from the sample that has a certain
probability of including the population parameter over the long run.
a. Hypothesis
b. Lower limit
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