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Math Problems
Grade 8
Identify representative, random, and biased samples
Darnel polled the
2
2
2
fastest swimmers on the swim team.
\newline
Is this a random sample of the swimmers on the swim team?
\newline
Choices:
\newline
(A) yes
\newline
(B) no
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Arianna threw a handful of photos into the air, then collected the
27
27
27
photos that landed on the rug.
\newline
Is this a random sample of the photos?
\newline
Choices:
\newline
(A) yes
\newline
(B) no
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Estelle asked
10
10
10
random students in the lunch line if they would be willing to discuss what they planned to buy for lunch.
2
2
2
of them said yes.
\newline
Is this sample of the students in the lunch line likely to be biased?
\newline
Choices:
\newline
(A)yes
\newline
(B)no
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Connor surveyed the
17
17
17
residents in the neighborhood who had young children.
\newline
Is this sample of the residents in the neighborhood likely to be biased?
\newline
Choices:
\newline
(A)yes
\newline
(B)no
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Chandler polled the first
97
97
97
runners to finish a marathon.
\newline
Is this a random sample of the runners?
\newline
Choices:
\newline
(A)yes
\newline
(B)no
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Serenity has a collection of
140
140
140
coins. How many coins represent
10
%
10 \%
10%
of her collection?
\newline
Answer:
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Kadeesha wants to buy a car for
$
14
,
500
\$ 14,500
$14
,
500
. If she can make a down payment of
$
2
,
610
\$ 2,610
$2
,
610
, then how much does Kadeesha need to borrow from the bank?
\newline
Answer:
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Cai wants to buy a home for
$
570
,
000
\$ 570,000
$570
,
000
. If he can make a down payment of
$
28
,
500
\$ 28,500
$28
,
500
, then how much does Cai need to borrow from the bank?
\newline
Answer:
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Tyee wants to buy a home for
$
480
,
000
\$ 480,000
$480
,
000
, but can only get a loan from the bank for
$
364
,
800
\$ 364,800
$364
,
800
. What percentage does Tyee have to put down in order to pay for the home?
\newline
Answer:
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Xin wants to buy a home for
$
260
,
000
\$ 260,000
$260
,
000
, but can only get a loan from the bank for
$
221
,
000
\$ 221,000
$221
,
000
. What percentage does Xin have to put down in order to pay for the home?
\newline
Answer:
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