MATH 225N Statistics Final Exam, Most Recent Exam 2025/2026
Actual Complete Real Exam Questions And Correct Answers
(Verified Answers) Already Graded A+ Guaranteed Success!!
Newest Exam / Just Released!!– Chamberlain College of Nursing
MATH 225N Statistics Final EXAM 2025 Update!!
The peak shopping time at a pet store is between 8-11:00 am
on Saturday mornings. Management at the pet store randomly
selected 185 customers last Saturday morning and decided to
observe their shopping habits. They recorded the number of
items that a sample of the customers purchased as well as the
total time the customers spent in the store. Identify the types of
variables recorded by the pet store. - ANSWER-number of items
- discrete; total time - continuous
A local eat-in pizza restaurant wants to investigate the
possibility of starting to deliver pizzas. The owner of the store
has determined that home delivery will be successful if the
average time spent on the deliveries does not exceed 40
minutes. The owner has randomly selected 22 customers and
has delivered pizzas to their homes in order to test if the mean
delivery time actually exceeds 40 minutes. Suppose the P-value
for the test was found to be 0.0281. State the correct
conclusion. - ANSWER-At α = 0.025, we fail to reject H0.
The tread life of a particular brand of tire is a random variable
best described by a normal distribution with a mean of 60,000
,miles and a standard deviation of 2900 miles. What is the
probability a particular tire of this brand will last longer than
57,100 miles? - ANSWER-0.8413
A physical fitness association is including the mile run in its
secondary-school fitness test. The time for this event for boys
in secondary school is known to possess a normal distribution
with a mean of 450 seconds and a standard deviation of 60
seconds. Find the probability that a randomly selected boy in
secondary school can run the mile in less than 312 seconds. -
ANSWER-0.0107
Identify the type of sampling used.
Every fifth adult entering an airport is checked for extra
security screening.
What sampling technique is used? - ANSWER-
systematic
Identify the type of sampling used.
At a local technical school, five auto repair classes are
randomly selected and all of the students from each class are
interviewed. What sampling technique is used? - ANSWER-
cluster
Determine the level of measurement of the variable.
the year of manufacture of a car - ANSWER-interval
,Identify the type of sampling used.
A travel industry researcher interviews all of the passengers
on five randomly
selected cruises. What sampling technique is used? -
ANSWER-cluster
Identify the type of sampling used.
A lobbyist for the oil industry assigns a number to each senator
and then uses a
computer to randomly generate ten numbers. The
lobbyist contacts the
senators corresponding to these numbers. What sampling
technique was used?
- ANSWER-simple
random
Classify the variable as qualitative or quantitative.
the weights of cases loaded onto an airport conveyor
belt - ANSWER-
quantitative
Identify the type of sampling used.
Thirty-five math majors, 47 music majors and 51 history
majors are randomly
, selected from 376 math majors, 591 music majors and 267
history majors at the
state university. What sampling technique is used? -
ANSWER-stratified
Determine whether the underlined value is a parameter or a
statistic.
In a survey conducted in the town of Atherton, 28% of adult
respondents reported that they had been involved in at least
one car accident in the past ten years. - ANSWER-statistic
Determine whether the underlined value is a parameter or a
statistic.
51.4% of the residents of Idlington Garden City are female.
- ANSWER-
Parameter
Determine whether the quantitative variable is discrete or
continuous.
the number of goals scored in a hockey game - ANSWER-
descrete
Determine what type of observational study is described.
Explain.
Actual Complete Real Exam Questions And Correct Answers
(Verified Answers) Already Graded A+ Guaranteed Success!!
Newest Exam / Just Released!!– Chamberlain College of Nursing
MATH 225N Statistics Final EXAM 2025 Update!!
The peak shopping time at a pet store is between 8-11:00 am
on Saturday mornings. Management at the pet store randomly
selected 185 customers last Saturday morning and decided to
observe their shopping habits. They recorded the number of
items that a sample of the customers purchased as well as the
total time the customers spent in the store. Identify the types of
variables recorded by the pet store. - ANSWER-number of items
- discrete; total time - continuous
A local eat-in pizza restaurant wants to investigate the
possibility of starting to deliver pizzas. The owner of the store
has determined that home delivery will be successful if the
average time spent on the deliveries does not exceed 40
minutes. The owner has randomly selected 22 customers and
has delivered pizzas to their homes in order to test if the mean
delivery time actually exceeds 40 minutes. Suppose the P-value
for the test was found to be 0.0281. State the correct
conclusion. - ANSWER-At α = 0.025, we fail to reject H0.
The tread life of a particular brand of tire is a random variable
best described by a normal distribution with a mean of 60,000
,miles and a standard deviation of 2900 miles. What is the
probability a particular tire of this brand will last longer than
57,100 miles? - ANSWER-0.8413
A physical fitness association is including the mile run in its
secondary-school fitness test. The time for this event for boys
in secondary school is known to possess a normal distribution
with a mean of 450 seconds and a standard deviation of 60
seconds. Find the probability that a randomly selected boy in
secondary school can run the mile in less than 312 seconds. -
ANSWER-0.0107
Identify the type of sampling used.
Every fifth adult entering an airport is checked for extra
security screening.
What sampling technique is used? - ANSWER-
systematic
Identify the type of sampling used.
At a local technical school, five auto repair classes are
randomly selected and all of the students from each class are
interviewed. What sampling technique is used? - ANSWER-
cluster
Determine the level of measurement of the variable.
the year of manufacture of a car - ANSWER-interval
,Identify the type of sampling used.
A travel industry researcher interviews all of the passengers
on five randomly
selected cruises. What sampling technique is used? -
ANSWER-cluster
Identify the type of sampling used.
A lobbyist for the oil industry assigns a number to each senator
and then uses a
computer to randomly generate ten numbers. The
lobbyist contacts the
senators corresponding to these numbers. What sampling
technique was used?
- ANSWER-simple
random
Classify the variable as qualitative or quantitative.
the weights of cases loaded onto an airport conveyor
belt - ANSWER-
quantitative
Identify the type of sampling used.
Thirty-five math majors, 47 music majors and 51 history
majors are randomly
, selected from 376 math majors, 591 music majors and 267
history majors at the
state university. What sampling technique is used? -
ANSWER-stratified
Determine whether the underlined value is a parameter or a
statistic.
In a survey conducted in the town of Atherton, 28% of adult
respondents reported that they had been involved in at least
one car accident in the past ten years. - ANSWER-statistic
Determine whether the underlined value is a parameter or a
statistic.
51.4% of the residents of Idlington Garden City are female.
- ANSWER-
Parameter
Determine whether the quantitative variable is discrete or
continuous.
the number of goals scored in a hockey game - ANSWER-
descrete
Determine what type of observational study is described.
Explain.
