STATS 250 EXAM 1 QUESTIONS AND ANSWERS 2026
Statistics - Answers -is the science of conducting studies to collect, organize,
summarize, analyze, and draw conclusions from data.
biased sample - Answers -is a sample that is not representative of the population.
B) hypothesis variable - Answers -If a weather center monitors and calculates the
average number of tornadoes that pass through Topeka, Kansas each year, what type
of variable would they be investigating?
A) isolated variable
B) hypothesis variIf a weather center monitors and calculates the average number of
tornadoes that pass through Topeka, Kansas each year, what type of variable would
they be investigating?
able
C) controlled variable
D) random variable
B) A sample is a group of subjects selected from a population to be studied. - Answers
-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 observation.
B) A sample is a group of subjects selected from a population to be studied.
C) A population is a group of samples that may or may not be included in a study.
D) A population and a sample are not related.
B) inferential statistics - Answers -Determine which branch of statistics was used to
make the following statement. In 2025, the world population is predicted to be 8 billion
people
A) time series statistics
B) inferential statistics
C) descriptive statistics
D) differential statistics
B) descriptive statistics - Answers -Determine which branch of statistics was used to
make the following statement. Based on a sample of 2739 respondents, it is estimated
that pet owners spent a total of 14 billion dollars on veterinarian care for their pets.
A) inferential statistics
B) descriptive statistics
C) time series statistics
, D) differential statistics
D) ii and iii only - Answers -Determine which of the following describes qualitative data.
i). the volume of a shipping container, in gallons
ii). the name of the material from which the container is made
iii), the shape of the container
A) i and ii only
B) i, ii, and iii
C) i and iii only
D) ii and iii only
D) the pre-season ranking of Duke University's men's basketball team - Answers -
Which one of the following data are discrete?
A) the average height of players on the University of Connecticut's women's basketball
team
B) the average preseason ranking of the University of Connecticut's women's basketball
team over the past 10 years
C) the height of the tallest player on Duke University's men's basketball team
D) the pre-season ranking of Duke University's men's basketball team
Determine which of the following describes nominal data.
i. My favorite days of the week are Friday, Saturday, and Tuesday
ii. My favorite day of the week is Friday, my second-favorite is Saturday, and third-
favorite is Tuesday
A) neither i nor ii
B) i only
C) ii only
D) both i and ii - Answers -B) i only
What type of sampling is being employed if the country is divided into economic classes
and a sample is chosen from each class to be surveyed?
A) systematic sampling
B) random sampling
C) cluster sampling
D) stratified sampling - Answers -D) stratified sampling
Which of the following sample types should you always regard as unreliable?
A) cluster samples
B) simple random samples
C) voluntary response samples
D) stratified samples - Answers -C) voluntary response samples
Statistics - Answers -is the science of conducting studies to collect, organize,
summarize, analyze, and draw conclusions from data.
biased sample - Answers -is a sample that is not representative of the population.
B) hypothesis variable - Answers -If a weather center monitors and calculates the
average number of tornadoes that pass through Topeka, Kansas each year, what type
of variable would they be investigating?
A) isolated variable
B) hypothesis variIf a weather center monitors and calculates the average number of
tornadoes that pass through Topeka, Kansas each year, what type of variable would
they be investigating?
able
C) controlled variable
D) random variable
B) A sample is a group of subjects selected from a population to be studied. - Answers
-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 observation.
B) A sample is a group of subjects selected from a population to be studied.
C) A population is a group of samples that may or may not be included in a study.
D) A population and a sample are not related.
B) inferential statistics - Answers -Determine which branch of statistics was used to
make the following statement. In 2025, the world population is predicted to be 8 billion
people
A) time series statistics
B) inferential statistics
C) descriptive statistics
D) differential statistics
B) descriptive statistics - Answers -Determine which branch of statistics was used to
make the following statement. Based on a sample of 2739 respondents, it is estimated
that pet owners spent a total of 14 billion dollars on veterinarian care for their pets.
A) inferential statistics
B) descriptive statistics
C) time series statistics
, D) differential statistics
D) ii and iii only - Answers -Determine which of the following describes qualitative data.
i). the volume of a shipping container, in gallons
ii). the name of the material from which the container is made
iii), the shape of the container
A) i and ii only
B) i, ii, and iii
C) i and iii only
D) ii and iii only
D) the pre-season ranking of Duke University's men's basketball team - Answers -
Which one of the following data are discrete?
A) the average height of players on the University of Connecticut's women's basketball
team
B) the average preseason ranking of the University of Connecticut's women's basketball
team over the past 10 years
C) the height of the tallest player on Duke University's men's basketball team
D) the pre-season ranking of Duke University's men's basketball team
Determine which of the following describes nominal data.
i. My favorite days of the week are Friday, Saturday, and Tuesday
ii. My favorite day of the week is Friday, my second-favorite is Saturday, and third-
favorite is Tuesday
A) neither i nor ii
B) i only
C) ii only
D) both i and ii - Answers -B) i only
What type of sampling is being employed if the country is divided into economic classes
and a sample is chosen from each class to be surveyed?
A) systematic sampling
B) random sampling
C) cluster sampling
D) stratified sampling - Answers -D) stratified sampling
Which of the following sample types should you always regard as unreliable?
A) cluster samples
B) simple random samples
C) voluntary response samples
D) stratified samples - Answers -C) voluntary response samples
