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Math 7 Unit 8 Final Review Flashcards | StudBud
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Math 7 Unit 8 Final Review
Math 7 Unit 8 Final Review
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1
What is the median?
19
2
24
53
2
What is the probability that a number less than 7 will appear when you roll a die one time?
1
0
1/2
1/6
3
WCMS is thinking about which electives to offer next year. Which sample seems the most valid to gather the best data?
A. Ask every tenth student in all math classes.
D. Poll the members on Student Council.
C. Ask the teachers.
B. Poll the players on the football team.
4
What is the range of the following box plot?
8
2
-8
-2
5
What is the P(E) of drawing a red marble, replacing it, and then a green marble from the bag?
3/10 x 4/10 = 3/25
3/10 + 4/10 = 7/20
3/10 x 4/10 = 7/25
6
Two dice are rolled. What is the probability that the sum is 12?
1/36
1/6
0
1/12
7
What’s the chance of you eating all yellow skittles, then green skittles & then red skittles?
1/15
8/675
2/39
1/39
8
If the probability of an event happening is ¼, then the probability of it not happening is ¾.
False
True
9
How many total cone and ice cream combinations can be made from the picture?
9 combinations
7 combinations
4 combinations
8 combinations
10
What is the relative frequency of taking the bus to school?
26
2/15
4
4/20
11
How many different cake combinations?
18
12
3
6
12
Quiz scores for Group A were: 4, 5, 6, 10, and 10. What is the Mode of the data?
6
10
5
4
13
Which is a measure of center?
Range
MAD
Medium
Mean
14
You have 5 quarters, 12 dimes, 6 nickels, and 7 pennies. Find the probability of not a nickel.
4/5
1/5
1/30
6/30
15
There are 7 tomatos. 2 are green, 3 are red, and 2 are yellow. What is the chance of a yellow?
3/7
2/6
2/7
4/8
16
Two coins are tossed. What is the probability of getting two heads, P(HH)?
1/2
1/4
1
0
17
If an event is
certain to occur
, it has a probability of zero.
False
True
18
7th grade is preparing for their field day. They want to gather ideas. Which of the below samples would be the worst?
B. Have each seventh grade homeroom complete a survey.
C. Poll every tenth eighth grader that enters the building.
A. Poll every 15th seventh grader that walks out of lunch.
D. Ask the seventh grade representatives on Student Council.
19
You roll a fair six-sided die once. What is the probability of getting an
even number
?
0
1/3
1/6
1/2
20
Quiz scores for Group A were: 4, 5, 6, 10, and 10. What is the Mean of the data?
5
6
4
7
21
You roll two dice. What is the probability of rolling a number
greater than 4 at least once
?
27/36
1
20/36
24/36
22
Joy surveys kids leaving GAP to determine what brand kids like best. Which best explains why her results are not valid?
Survey should have been conducted online
the group surveyed were all at GAP
survey conducted only by Joy
group surveyed were only kids
23
What is the Interquartile range of this box plot?
5
8
4
1052
24
Find the Median
30
41
35
40
25
I toss a penny, a nickel, a dime and then a quarter. What is the probability I get all heads or all tails?
1/16
14/16
None of the these
2/16
26
Quiz scores for Group A were: 4, 5, 6, 10, and 10. What is the Mean Absolute Deviation (MAD) of the data? (Mean = 7)
2.3
2.5
2.2
2.4
27
There are 9 red, 5 yellow, and 7 green jellybeans in a jar. Solve, without replacement:
16/41 or 39%
140/189 or 74.1%
63/420 or 15%
63/441 or 14.3%
28
A pet shelter has 18 dogs, 13 cats, and 5 rabbits? Find the probability of a cat or a dog?
1/2
13/36
31/36
13/72
29
Given a bag with 12 red and 7 green marbles, what is the odds of randomly selecting a
red
one?
12/19
7/12
1/2
7/19
30
If an event is
impossible
, it has a probability of zero.
True
False
31
On a single roll of a standard die, what is the probability that a 3 will NOT appear?
3/6
5/6
1/6
0
32
A jar of candy has 17 cinnamon pieces, 4 caramels, and 29 mints. Solve, without replacement:
116/2450 or 4.7%
196/1508 or 13%
33/99 or 33.3%
116/2500 or 4.6%
33
This shows the amt of time it took people in each group to take a quiz. Describe variability.
Variability of the times for the 2 groups are about the same
Variability of the times for Group S is > than for Group R
Variability of the times for Group R is > than for Group S
34
Masoon will collect data to find out where the 7th grade students should take a field trip. Which is the best data?
First 25 students in lunch line
twenty of his friends
all students in a dance class
10 random people from 7th grade
35
The scores of a quiz were: 8, 6, 9, 7, 10, 9, 5, 4, 9. The median of the scores is
9
7.5
8
7
36
How many different combinations are there in on this pizza menu?
80
20
60
12
37
I have 2 shirts, 2 shorts, 2 pairs of pants and 2 pairs of shoes. How many total combinations of outfits do I have?
4
8
2
16
38
4 red, 6 blue, 5 green: P (red then green) without replacement?
4/15 X 5/15 = 20/225
4/15 X 5/14= 2/21
4/15 + 5/14 = 20/29
4/15 + 5/14 = 9/29
39
You flip a coin and chose letters from the alphabet. What is the probability of getting a tails and choosing a vowel?
None of these.
21/26
5/52
5/26
40
With replacement, what is the probability you will pull out a yellow, green, and blue marble?
8/100
4/10
5/210
2/250
41
Quiz scores for Group A were: 4, 5, 6, 10, and 10. What is the Range of the data?
6
4
7
5
42
How many combinations do you have?
2
3
6
12
43
What is the probability that the spinner lands on pink followed by blue?
1/32 or 3.1%
1/8 or 12.5%
2/12 or 16.7%
4/8 or 50%
44
With replacement, what is the probability you will pull out a green and orange?(10 marbles)
0
3/100
4/10
8/250
45
An event with a probability of 0.1 ...
is very likely to occur.
Equally Likely as not
is not very likely to occur.
is certain to occur.
46
Find the Mean
35
40
32
41
47
Find the range
5
86
2
34
48
A bowl contains 2 red chips, 4 blue chips, 3 yellow chips and 1 green chip. P(red)?
1/5
2
2/10
2/7
49
Spinner is spun 3 times. Find probability of Green, Green, Green.
3/12
1/64
3/4
1/4
50
What is the probability the next drink will be a small cocoa?
3/20
1/15
10/67
6/35
51
Ava surveys students at a movie about their favorite activity. She determines most like movies. Best conclusion?
valid because surveyed a large number
not valid because she surveyed at a movie theater
valid because surveyed people at a movie
not valid because only surveyed students
52
With replacement, what is the probability you will pull out a green and yellow?
4/10
1/25
8/250
3/100
53
What is sample space, S?
The total possible outcomes of an event.
The favorable outcomes of an event.
The area where samples are.
54
Find the MAD
8
10
9
7
55
A bag has 10 blue marbles, 25 green marbles, and 15 purple marbles.
25/100 or 25%
150/2450 or 6.1%
150/2500 or 6%
100/250 or 40%
56
What is the Mean Absolute Deviation?
average of the data
median distance from mean
median of the data
average distance from mean
57
The MAD tells us how much variability is in our data
False
True
58
Which of the following experiments does
NOT have equally likely outcomes
?
Toss a coin.
Choose a letter at random for the word MATH
Choose a letter at random from the word SCHOOL.
Choose a number at random from 1 to 7.
59
What is the probability of rolling a number
greater than 4
?
1/3
1/2
0
1
