Introduction to Statistics Unit 1:
Milestone 1 Exam Questions &
Answers (Grade A+)
Which of these statements best defines a stratified random
sample? - correct answer ✅It is a sample where the population is
first broken into groups and then elements are randomly selected,
in proportion, from each group.
Which of the following data types will be continuous? - correct
answer ✅The amount of snow that fell last night.
A study in which results are measured without intervention from
the researcher is called... - correct answer ✅Observational study.
Which of the following best classifies the arrangement of bean
bags? - correct answer ✅Low accuracy and low precision.
Mike wants to find out the approximate income for professors in
Michigan. He decides to randomly select 50 professors who work
for a college or university in Michigan and obtain their salaries.
What are the sample and the population of Mike's study? - correct
answer ✅The 50 professors that Mike interviews are his sample,
and all of the professors who work in Michigan are the population.
, Introduction to Statistics Unit 1:
Milestone 1 Exam Questions &
Answers (Grade A+)
James conducts a survey to study the relationship between cell
phone use and grades earned during the fall semester. James
suspects that there might be a lot of other factors that affect grades
besides cell phones.
Which of the following could be a confounding variable in James's
study? - correct answer ✅Time spent studying.
Cindy measured and recorded the temperature of a liquid for an
experiment. She used a poorly calibrated thermometer and noted
the temperature as 100.5 degrees Fahrenheit. The actual
temperature of the liquid was 95 degrees Fahrenheit.
The percent error in her calculation is... - correct answer ✅5.79%
On a candy production line, 3% of bags are overfilled. An employee
randomly selects 100 bags and finds that 5% are overfilled. A
second employee takes another random sample of 250 bags and
finds that 2% are overfilled.
Milestone 1 Exam Questions &
Answers (Grade A+)
Which of these statements best defines a stratified random
sample? - correct answer ✅It is a sample where the population is
first broken into groups and then elements are randomly selected,
in proportion, from each group.
Which of the following data types will be continuous? - correct
answer ✅The amount of snow that fell last night.
A study in which results are measured without intervention from
the researcher is called... - correct answer ✅Observational study.
Which of the following best classifies the arrangement of bean
bags? - correct answer ✅Low accuracy and low precision.
Mike wants to find out the approximate income for professors in
Michigan. He decides to randomly select 50 professors who work
for a college or university in Michigan and obtain their salaries.
What are the sample and the population of Mike's study? - correct
answer ✅The 50 professors that Mike interviews are his sample,
and all of the professors who work in Michigan are the population.
, Introduction to Statistics Unit 1:
Milestone 1 Exam Questions &
Answers (Grade A+)
James conducts a survey to study the relationship between cell
phone use and grades earned during the fall semester. James
suspects that there might be a lot of other factors that affect grades
besides cell phones.
Which of the following could be a confounding variable in James's
study? - correct answer ✅Time spent studying.
Cindy measured and recorded the temperature of a liquid for an
experiment. She used a poorly calibrated thermometer and noted
the temperature as 100.5 degrees Fahrenheit. The actual
temperature of the liquid was 95 degrees Fahrenheit.
The percent error in her calculation is... - correct answer ✅5.79%
On a candy production line, 3% of bags are overfilled. An employee
randomly selects 100 bags and finds that 5% are overfilled. A
second employee takes another random sample of 250 bags and
finds that 2% are overfilled.
