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Math Problems
Algebra 1
Identify biased samples
Tommy surveyed
5
5
5
passengers on a city bus.
\newline
Is this sample of the inhabitants of the city likely to be biased?
\newline
Choices:
\newline
(A)yes
\newline
(B)no
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Ling decided to interview two of the six city council members. She labeled their names from
1
1
1
to
6
6
6
, then rolled a six-sided die until she got two different numbers telling her which to interview.
\newline
Is this sample of the city council members likely to be biased?
\newline
Choices:
\newline
(A)yes
\newline
(B)no
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Without looking, Amelia took
27
27
27
coins out of a jar of equal-valued coins.
\newline
Is this sample of the coins in the jar likely to be biased?
\newline
Choices:
\newline
(A)yes
\newline
(B)no
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During an art show at the local gallery, Franco closely examined
5
5
5
pieces of art by each artist whose work was on display there. Each artist had an equal number of pieces on display.
\newline
Is this sample of the art in the gallery likely to be biased?
\newline
Choices:
\newline
(A)yes
\newline
(B)no
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For a statistics project, Julie distributed a questionnaire and asked her classmates to fill it out.
12
12
12
of them did.
\newline
Is this sample of the students in the class likely to be biased?
\newline
Choices:
\newline
(A)yes
\newline
(B)no
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Turner polled
42
42
42
people throughout each city in his county. Each city is the same size.
\newline
Is this sample of the residents of cities in the county likely to be biased?
\newline
Choices:
\newline
(A)yes
\newline
(B)no
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In March, Delphine's house had
40
%
40 \%
40%
more snowfall than in February. Delphine's house had
f
f
f
centimeters of snowfall in February.
\newline
Which of the following expressions could represent how much snowfall Delphine had at her house in March?
\newline
Choose
2
2
2
answers:
\newline
A
40
f
40 f
40
f
\newline
B
40
+
f
40+f
40
+
f
\newline
C
1.4
f
1.4 f
1.4
f
\newline
D
40
f
+
f
40 f+f
40
f
+
f
\newline
E
4
10
f
+
f
\frac{4}{10} f+f
10
4
f
+
f
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A submarine is cruising at a depth of
−
50
m
-50 \mathrm{~m}
−
50
m
relative to the surface of the ocean. It dives to
−
110
m
-110 \mathrm{~m}
−
110
m
to avoid sonar detection.
\newline
What was the submarine's change in altitude?
\newline
m
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