Statistics Final Exam Questions and Correct Answers | Latest Update
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Course
Statistics
Institution
Statistics
A large state university conducted a survey among their students and received 400
responses. The survey asked the students to provide the following information:
*Age
*Year in School (Freshman, Sophomore, Junior, Senior)
*Major
What type of graph would you use to describe the variable Major?
...
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A histogram because Age is a numerical variable.
The two histograms below display the exact same data. How do the plots differ?
Histogram (i) uses relative frequencies to show the proportion of
observations at a given value. Histogram (ii) uses frequencies to simply
count the number of observations at a given value.
In a survey, high school graduates were asked "Did you play sports in high school?" The
response was electronically recorded as a "1" for yes and a "0" for no. This is an example of .
coded categorical data
In a survey, married couples were asked, "Do you have children?" The response was
electronically recorded as a "1" for yes and a "0" for no. This is an example of .
Coded categorical data
In a study of 900 adults, 45 out of the 325 men in the study said that they preferred to rent a
movie on DVD rather than going out to a movie theater.What is the approximate percentage
of men in this study who prefer to rent a movie on DVD?
13.8%
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In a study of 1350 elementary school children, 118 out of the 615 girls in the study said they
want to be a teacher when they grow up.What percent of girls want to be a teacher when
they grow up?
19.2%
The histogram below shows the distribution of pass rates on a swimming test taken by all
children who completed a four week summer swim course at the local YMCA. What is the
typical pass rate for the swim test?
about 75%
Marital status of each member of a randomly selected group of adults is an example of what
type of variable?
categorical variable
The number of parents who attended parent teacher conferences at a local elementary school
is an example of what type of variable?
numerical variable
A group of 500 patients who suffer from hypothyroidism, a condition in which your thyroid
does not produce enough of certain hormones, were asked to participate in a study to
determine the effectiveness of a new medication. The patients were randomly divided into two
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groups, one that was given the actual medication, and one that received a placebo pill. The
results of the study are below.
Was the new medication effective in treating hypothyroidism?
Yes, a higher percent of patients who took the medication had improved
symptoms than the patients who took the placebo.
Which of the following would likely show a bimodal distribution in a histogram?
The heights of all students in a high school band.
A doctor is interested in determining whether a certain medication increases the risk of high
blood pressure. He reviews his patients' medical records and finds that a higher proportion of
people who take the medication are suffering from high blood pressure.
observational study
A group of students is divided into two groups. One group is a given a new chewable vitamin
and the other group is given a placebo. After six months they are asked to fill out a
questionnaire and given a health exam to see whether the new vitamin has health benefits that
are better than a placebo.
controlled experiment
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