STATS 365 FINAL EXAM STUDY SET MR. HUBER KU 2026/2027 |
STATISTICS STUDY GUIDE, PRACTICE QUESTIONS, ANSWERS & EXAM
REVIEW
Exam 1:
The weights of fish caught in Clinton Lake is an example of what type of data?
a. Quantitative - Discrete
b. Categorical
c. Qualitative
d. Quantitative - Continuous - ANS ✔✔d. Quantitative - Continuous
A statistical device used in exploratory data analysis which is a combination of a frequency distribution,
and a histogram is called a (n)
a. Ogive
b. Boxplot
c. Stem-Leaf Plot
d. Line Dot Plot - ANS ✔✔c. Stem-Leaf Plot
A statistic that tells the numbers of standard deviations a data value is above or below the mean is
called:
a. A quartile
b. A percentile
c. A coefficient of variation
d. A Z-score - ANS ✔✔d. A Z-score
Which is NOT true of the data shown in the histogram? (Q4):
a. The distribution is approximately symmetric.
b. The mean and median are approximately equal
c. The median and IQR summarize the data better than the mean and standard deviation.
d. The Empirical rule may be applied to this data set. - ANS ✔✔c. The median and IQR summarize the
data better than the mean and standard deviation.
When a distribution is bell shaped approximately what proportion of data values will fall within 2
standard deviations of the mean?
a. 50%
b. 68%
c. 95%
d. 99.9% - ANS ✔✔c. 95%
If 30% of the people in a community use the library in one year, find the probability of exactly seven used
the library from a sample of 15 people. Use the Binomial Distribution
a. .950
b. .005
c. .919
, d. .081 - ANS ✔✔d .081
Which is not part of the 5 number summary?
a. Q1 and Q3
b. The mean
c. The Median
d. The Maximum and Minimum - ANS ✔✔b. The Mean
Which of the following correctly describes the relationship between a sample and a population?
a. A sample is a group of populations that are subject to observations.
b. A population is a group of samples that may or may not be included in a study.
c. A sample is a group of subjects selected from a population to be studied.
d. A population and a sample are not related. - ANS ✔✔a. A sample is a group of populations that are
subject to observations.
The average credit card debt for college seniors is $3262. If the debt is normally distributed with a
standard deviation of $1100, find the probability that the senior owes more than $4000.
a. 0.2514
b. 0.7486
c. 0.7826
d. 0.2174 - ANS ✔✔a. 0.2514
The mean lifetime of a wristwatch is 25 months with a standard deviation of 5 months. If the distribution
is normal, for how many months should a guarantee be made if the manufacturer does not want to
exchange more than 10% of the watches?
a. 22.5 Months
b. 27.5 Months
c. 18.6 Months
d. 31.4 Months - ANS ✔✔c. 18.6 Months
These temperatures were recorded in Lawrence for a week in January:
16, 27, 22, 18, 11, 9, 0
Find the Standard Deviation.
a. 6.4
b. 8.3
c. 18
d. 8.9 - ANS ✔✔d. 8.9
Fill in the Blank __________ Paradox occurs when combining or aggregating data masks underlying
patterns.
a. Taylor
b. Sampsons
c. Euler's
d. Simpsons - ANS ✔✔Simpson's
The positive square root of the variance is called the ___________
a. Midrange
b. Standard Deviation
STATISTICS STUDY GUIDE, PRACTICE QUESTIONS, ANSWERS & EXAM
REVIEW
Exam 1:
The weights of fish caught in Clinton Lake is an example of what type of data?
a. Quantitative - Discrete
b. Categorical
c. Qualitative
d. Quantitative - Continuous - ANS ✔✔d. Quantitative - Continuous
A statistical device used in exploratory data analysis which is a combination of a frequency distribution,
and a histogram is called a (n)
a. Ogive
b. Boxplot
c. Stem-Leaf Plot
d. Line Dot Plot - ANS ✔✔c. Stem-Leaf Plot
A statistic that tells the numbers of standard deviations a data value is above or below the mean is
called:
a. A quartile
b. A percentile
c. A coefficient of variation
d. A Z-score - ANS ✔✔d. A Z-score
Which is NOT true of the data shown in the histogram? (Q4):
a. The distribution is approximately symmetric.
b. The mean and median are approximately equal
c. The median and IQR summarize the data better than the mean and standard deviation.
d. The Empirical rule may be applied to this data set. - ANS ✔✔c. The median and IQR summarize the
data better than the mean and standard deviation.
When a distribution is bell shaped approximately what proportion of data values will fall within 2
standard deviations of the mean?
a. 50%
b. 68%
c. 95%
d. 99.9% - ANS ✔✔c. 95%
If 30% of the people in a community use the library in one year, find the probability of exactly seven used
the library from a sample of 15 people. Use the Binomial Distribution
a. .950
b. .005
c. .919
, d. .081 - ANS ✔✔d .081
Which is not part of the 5 number summary?
a. Q1 and Q3
b. The mean
c. The Median
d. The Maximum and Minimum - ANS ✔✔b. The Mean
Which of the following correctly describes the relationship between a sample and a population?
a. A sample is a group of populations that are subject to observations.
b. A population is a group of samples that may or may not be included in a study.
c. A sample is a group of subjects selected from a population to be studied.
d. A population and a sample are not related. - ANS ✔✔a. A sample is a group of populations that are
subject to observations.
The average credit card debt for college seniors is $3262. If the debt is normally distributed with a
standard deviation of $1100, find the probability that the senior owes more than $4000.
a. 0.2514
b. 0.7486
c. 0.7826
d. 0.2174 - ANS ✔✔a. 0.2514
The mean lifetime of a wristwatch is 25 months with a standard deviation of 5 months. If the distribution
is normal, for how many months should a guarantee be made if the manufacturer does not want to
exchange more than 10% of the watches?
a. 22.5 Months
b. 27.5 Months
c. 18.6 Months
d. 31.4 Months - ANS ✔✔c. 18.6 Months
These temperatures were recorded in Lawrence for a week in January:
16, 27, 22, 18, 11, 9, 0
Find the Standard Deviation.
a. 6.4
b. 8.3
c. 18
d. 8.9 - ANS ✔✔d. 8.9
Fill in the Blank __________ Paradox occurs when combining or aggregating data masks underlying
patterns.
a. Taylor
b. Sampsons
c. Euler's
d. Simpsons - ANS ✔✔Simpson's
The positive square root of the variance is called the ___________
a. Midrange
b. Standard Deviation
