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Math Problems
Grade 7
Identify representative, random, and biased samples
Dan surveyed his
2
2
2
favorite soccer players in the league about their training techniques.
\newline
Is this a random sample of the soccer players in the league?
\newline
Choices:
\newline
(A)yes
\newline
(B)no
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Tristan questioned
17
17
17
members of the city's gym.
\newline
Is this sample of the city's residents likely to be biased?
\newline
Choices:
\newline
(A)yes
\newline
(B)no
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Isabelle spoke with the
13
13
13
donors who gave the most money.
\newline
Is this sample of the donors likely to be representative?
\newline
Choices:
\newline
(A) yes
\newline
(B) no
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Paula surveyed the
47
47
47
customers in a shoe store on a Monday morning.
\newline
Is this sample of the shoe store's customers likely to be representative?
\newline
Choices:
\newline
(A)yes
\newline
(B)no
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Miguel put the names of all the cities in the state into a jar. Then, he drew
7
7
7
names out of the jar.
\newline
Is this a random sample of the cities in the state?
\newline
Choices:
\newline
(A) yes
\newline
(B) no
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Mr. McCormick, the psychology teacher, invited his students stay after school to participate in a study on learning styles so that he could better understand how to teach them.
10
10
10
of his students participated.
\newline
Is this a random sample of the teacher's students?
\newline
Choices:
\newline
(A)yes
\newline
(B)no
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Trudy researched
6
6
6
downtown districts throughout each county in her state. Each county has an equal number of downtown districts.
\newline
Is this sample of the downtown districts in the state likely to be representative?
\newline
Choices:
\newline
(A)yes
\newline
(B)no
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Maya surveyed
17
17
17
passengers on a city bus.
\newline
Is this a random sample of the inhabitants of the city?
\newline
Choices:
\newline
(A)yes
\newline
(B)no
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Leon polled the last
62
62
62
athletes to finish a bike race.
\newline
Is this a random sample of the athletes in the bike race?
\newline
Choices:
\newline
(A)yes
\newline
(B)no
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Kwame surveyed a large random sample of Chicago, Illinois households to learn the number of cars they have. The results of the survey are most representative of which of the following populations?
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Choose
1
1
1
answer:
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(A) US households
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(B) Midwestern households
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(C) Illinois households
\newline
(D) Chicago, Illinois households
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Michael planted five rows of flowers. Each row had six flowers. His dog ate eight of the flowers. How many flowers were left?
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****HINT: Many times, gardens look like arrays.
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22
22
22
\newline
19
19
19
\newline
3
3
3
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