Statistics Final Exam Questions And Answers(Revised Edition)100%Pass!!! A+Graded
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Statistics Final Exam Questions And Answers(Revised Edition)100%Pass!!! A+Graded
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, S...
Statistics Final Exam Questions And
Answers(Revised Edition)100%Pass!!!
A+Graded
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? - correct
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? - correct
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 - correct
answer...✔✔A histogram because Age is a numerical variable.
The two histograms below display the exact same data. How do the plots differ? -
correct 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 . - correct answer...✔✔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 . - correct
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? - correct
answer...✔✔13.8%
AGRADESOLUTIONS
,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? - correct 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? - correct answer...✔✔about 75%
Marital status of each member of a randomly selected group of adults is an example of
what type of variable? - correct 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? - correct 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? - correct
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? - correct
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. -
correct 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 and given a health exam to see whether the new vitamin has health
benefits that are better than a placebo. - correct 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. - correct 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
AGRADESOLUTIONS
, severity of their side effects to see whether the new drug improved the overall negative
side effects of chemotherapy. - correct 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? - correct 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? - correct answer...✔✔unstacked
A two-way table could be used for which of the following pairs of variables? - correct
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? - correct
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? - correct 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 - correct answer...✔✔Age and
weight are numerical variables. Gender, ethnicity, and favorite math class are
categorical variables.
In a sample of 775 senior citizens, approximately 67% said that they had seen a
television commercial for life insurance. About how many senior citizens is this? -
correct answer...✔✔519
Data was collected on hand grip strength of adults. The histogram below summarizes
the data. Which statement is true about the distribution of the data shown in the graph?
- correct answer...✔✔The graph shows evidence that two different groups may have
been combined into one collection.
A gym is offering a new 6-week diet plan for its members. Members who sign up for the
program are weighed and measured once a week for the duration of the program. The
owners of the gym want to know if the diet plan actually helps people lose weight. What
variable could be a possible confounding factor in determining the cause of weight loss?
- correct answer...✔✔the persons exercise routine
AGRADESOLUTIONS
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