Statistics Final Exam Questions With Correct Answers
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Course
Statistics
Institution
Statistics
THEBRIGHT EXAM SOLUTIONS 8/20/2024 8:37 PM
Statistics Final Exam Questions With
Correct Answers
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, Soph...
Statistics Final Exam Questions With
Correct Answers
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? - answer✔✔A bar chart
because Major is a categorical variable.
Parking at a university has become a problem. University administrators are interested in
determining the average time it takes a student to find a parking spot. An administrator
inconspicuously followed 180 students and recorded how long it took each of them to find a
parking spot. Which of the following types of graphs should NOT be used to display information
concerning the students parking times? - answer✔✔pie chart
A large state university conducted a survey among their students and received 300 responses.
The survey asked the students to provide the following information:* Age* Year in School
(Freshman, Sophomore, Junior, Senior)* Gender* GPA - answer✔✔A histogram because Age is
a numerical variable.
The two histograms below display the exact same data. How do the plots differ? -
answer✔✔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 . -
answer✔✔coded categorical data
, THEBRIGHT EXAM SOLUTIONS 8/20/2024 8:37 PM
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 . -
answer✔✔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? - answer✔✔13.8%
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? - answer✔✔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? - answer✔✔about 75%
Marital status of each member of a randomly selected group of adults is an example of what type
of variable? - answer✔✔categorical variable
The number of parents who attended parent teacher conferences at a local elementary school is
an example of what type of variable? - answer✔✔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 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? - answer✔✔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? -
answer✔✔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. -
answer✔✔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
, THEBRIGHT EXAM SOLUTIONS 8/20/2024 8:37 PM
and given a health exam to see whether the new vitamin has health benefits that are better than a
placebo. - answer✔✔controlled experiment
A group of students is divided into two groups. One group listens to classical music while taking
a math test and the other group takes the test in silence. The average test scores of the two groups
are compared to see whether listening to music during a math test has an effect on scores. -
answer✔✔Controlled experiment
A group of cancer patients is divided into two groups. One group is given a new drug to fight the
side effects of chemotherapy and the other group is given a placebo. After three months they are
asked to respond to a questionnaire about the frequency and severity of their side effects to see
whether the new drug improved the overall negative side effects of chemotherapy. -
answer✔✔Controlled experiment
The table gives the GPA and gender of students in a business class.Is the format of the data set
stacked or unstacked? - answer✔✔stacked
The table gives the GPA of some students in two math classes. One class meets in the morning
and one in the afternoon.
Is the format of the data set stacked or unstacked? - answer✔✔unstacked
A two-way table could be used for which of the following pairs of variables? - answer✔✔gender
and favorite class
A word cloud was created using the first chapter of John Green's The Fault in Our Stars. (Note
that filler words such as "the," "a/an," and "and" were excluded from the plot.)
What information is NOT explicitly portrayed in the word cloud? - answer✔✔The number of
times each word occurs.
Consider the following statement, "In a nationwide study, children on an all-organic diet are
more alert in school than those not on an all-organic diet." Which of the following is a plausible
confounding variable in this study? - answer✔✔School start times
The quality of the non-organic diet
Parents' social-economic status
Determine which of the following five variables are numerical and which are categorical.
age, gender, weight, ethnicity, favorite math class - answer✔✔Age and weight are numerical
variables. Gender, ethnicity, and favorite math class are categorical variables.
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