STATS 2024 Exam Questions with
Correct Answers
Hamden city's police department needs to choose whether to build a new addition to the
police station or to buy new squad cars. Which sampling option might they choose to
survey the community? - Answer-a random sample of 10% of all taxpayers
The manager of a popular restaurant wants to know what types of vegetarian dishes
people prefer to eat. Which sample would provide the most accurate data? - Answer-a
random group of 40 people on the street
Liliana wants to start a seventh-grade computer club at Hamden Middle School. She
surveyed 20 seventh-grade students at the town park. She asked each student how
many hours they spend on their computers each week. She obtained the following
results.
8, 15, 0, 11, 12, 13, 16, 13, 0, 4, 17, 14, 30, 13, 5, 12, 1, 13, 12, 21
What is the ratio of the total number of students who used their computers to the total
number of students surveyed? - Answer-18/20 or 9/10
A set P consists of all natural numbers between 1 and 100, inclusive. Use set-builder
notation to define P. - Answer-A
Park County, Wyoming, has a population of approximately 28,205 people. There are
two main cities in Park County: Cody, with a population of about 9,194 people, and
Powell, with a population of about 5,476 people. How many residents of Park County
live outside these two cities? - Answer-13,535
Jorani flips two standard American quarters. How many ways can she get at least one
head?
Hint: Let 2004-06-03-01-00_files/i0250000.jpg and let 2004-06-03-01-
00_files/i0250001.jpg - Answer-C. 3
Eldrick manages wildlife samples for Ducks Unlimited. Two samples of duck populations
at a migratory site are shown in the table below. Which statement about the samples is
true? - Answer-Eldrick should take another sample because there is too much variability
in the two samples.
A restaurant serves three types of omelettes. Surveys were taken of the last two days of
orders and are displayed in the table below. Approximately 200 omelettes are served
each day. What is the average number of ham and cheese omelettes served each day?
- Answer-120
, The owner of a local restaurant surveyed her staff on their preference of uniform color.
The results are displayed in the table below. Which pair of samples is most
representative of the preference of all the staff? - Answer-NOT None of the samples are
representative because none of the values remained constant.
Braden wants to compare the types of ducks in two nearby ponds. He collected two
samples using the following criteria. For sample 1, he counted the types of ducks on
Walden Pond from 6 A.M. to 9 A.M. For sample 2, he counted the number of Mallard
ducks that were on Brook's Pond from 12 P.M. to 3 P.M. What would improve Braden's
plan? Check all that apply. - Answer-Braden should sample the ducks on each pond at
the same time of day because animals are active at different times.
Braden should sample twice at each pond if he wants to make sure each sample is
representative of the population.
Braden should count more than Mallard ducks on Brook's Pond if he wants to compare
the types of ducks on each pond.
Mr. Sanchez surveyed classes to aid in planning the end-of-year party. For the first
sample, Mr. Sanchez surveyed every third person on each first-period class roster. For
the second sample, Mr. Sanchez surveyed his five honors math classes. Which
statement about Mr. Sanchez's samples is true? - Answer-Sample 2 is biased.
Ducks Unlimited helps sample duck species across the United States. Samples from
one particular location for the last two years are shown below. Which duck population
seemed to hold steady? - Answer-Wood Duck
Two samples were taken of fish caught on Small Lake and are shown in the table
below. It is estimated that the Small Lake fish population is roughly 1,000 fish. What is
the average number of brown trout in the lake? - Answer-80
Josiah kept track of how many songs of each genre were played in an hour from his
MP3 player. The counts are displayed in the table below. He has a total of 1,500 songs
on his player. Josiah predicted the number of rock songs on his MP3 player to be 300
songs. Which statements about his solution are true? Check all that apply. - Answer-He
should have found the average of the number of rock songs by averaging 4 and 6 to get
5.
He did not multiply the numerator and denominator by the correct number to equal
1,500.
He should have multiplied the numerator and denominator by 75, not 30, because
mr026-2.jpg.
Student representatives surveyed their classmates on their preference of a school
mascot for a new school. The results are shown in the table below. Which pair of
samples seems most representative of student preference? - Answer-NOT Sample 1
and sample 3 are most representative because 0 should not appear in a sample.
Correct Answers
Hamden city's police department needs to choose whether to build a new addition to the
police station or to buy new squad cars. Which sampling option might they choose to
survey the community? - Answer-a random sample of 10% of all taxpayers
The manager of a popular restaurant wants to know what types of vegetarian dishes
people prefer to eat. Which sample would provide the most accurate data? - Answer-a
random group of 40 people on the street
Liliana wants to start a seventh-grade computer club at Hamden Middle School. She
surveyed 20 seventh-grade students at the town park. She asked each student how
many hours they spend on their computers each week. She obtained the following
results.
8, 15, 0, 11, 12, 13, 16, 13, 0, 4, 17, 14, 30, 13, 5, 12, 1, 13, 12, 21
What is the ratio of the total number of students who used their computers to the total
number of students surveyed? - Answer-18/20 or 9/10
A set P consists of all natural numbers between 1 and 100, inclusive. Use set-builder
notation to define P. - Answer-A
Park County, Wyoming, has a population of approximately 28,205 people. There are
two main cities in Park County: Cody, with a population of about 9,194 people, and
Powell, with a population of about 5,476 people. How many residents of Park County
live outside these two cities? - Answer-13,535
Jorani flips two standard American quarters. How many ways can she get at least one
head?
Hint: Let 2004-06-03-01-00_files/i0250000.jpg and let 2004-06-03-01-
00_files/i0250001.jpg - Answer-C. 3
Eldrick manages wildlife samples for Ducks Unlimited. Two samples of duck populations
at a migratory site are shown in the table below. Which statement about the samples is
true? - Answer-Eldrick should take another sample because there is too much variability
in the two samples.
A restaurant serves three types of omelettes. Surveys were taken of the last two days of
orders and are displayed in the table below. Approximately 200 omelettes are served
each day. What is the average number of ham and cheese omelettes served each day?
- Answer-120
, The owner of a local restaurant surveyed her staff on their preference of uniform color.
The results are displayed in the table below. Which pair of samples is most
representative of the preference of all the staff? - Answer-NOT None of the samples are
representative because none of the values remained constant.
Braden wants to compare the types of ducks in two nearby ponds. He collected two
samples using the following criteria. For sample 1, he counted the types of ducks on
Walden Pond from 6 A.M. to 9 A.M. For sample 2, he counted the number of Mallard
ducks that were on Brook's Pond from 12 P.M. to 3 P.M. What would improve Braden's
plan? Check all that apply. - Answer-Braden should sample the ducks on each pond at
the same time of day because animals are active at different times.
Braden should sample twice at each pond if he wants to make sure each sample is
representative of the population.
Braden should count more than Mallard ducks on Brook's Pond if he wants to compare
the types of ducks on each pond.
Mr. Sanchez surveyed classes to aid in planning the end-of-year party. For the first
sample, Mr. Sanchez surveyed every third person on each first-period class roster. For
the second sample, Mr. Sanchez surveyed his five honors math classes. Which
statement about Mr. Sanchez's samples is true? - Answer-Sample 2 is biased.
Ducks Unlimited helps sample duck species across the United States. Samples from
one particular location for the last two years are shown below. Which duck population
seemed to hold steady? - Answer-Wood Duck
Two samples were taken of fish caught on Small Lake and are shown in the table
below. It is estimated that the Small Lake fish population is roughly 1,000 fish. What is
the average number of brown trout in the lake? - Answer-80
Josiah kept track of how many songs of each genre were played in an hour from his
MP3 player. The counts are displayed in the table below. He has a total of 1,500 songs
on his player. Josiah predicted the number of rock songs on his MP3 player to be 300
songs. Which statements about his solution are true? Check all that apply. - Answer-He
should have found the average of the number of rock songs by averaging 4 and 6 to get
5.
He did not multiply the numerator and denominator by the correct number to equal
1,500.
He should have multiplied the numerator and denominator by 75, not 30, because
mr026-2.jpg.
Student representatives surveyed their classmates on their preference of a school
mascot for a new school. The results are shown in the table below. Which pair of
samples seems most representative of student preference? - Answer-NOT Sample 1
and sample 3 are most representative because 0 should not appear in a sample.
