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Probability and Statistics Review
Probability and Statistics Review
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7th grade probability and statistics questions
Flashcards
30 cards
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Practice quiz
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Questions
30
Answers
1
How many times do you expect to roll a 2 if you roll a 6-sided die 420 times?
7
35
70
140
2
Find the Mean: 2, 9, 14, 13, 24, 45, 6, 9, 5, 3
13
16
14.4
10
3
We wanted to see the mean ACT score was in the US, so we interviewed the students at 1 school.
Sample
Population
4
What is the probability of choosing an M, replacing the card, and then choosing a T?
3/36
1/18
3/12
1/6
5
You have 7 purple, 5 green, and 2 yellow marbles. What is the likelihood of drawing a purple?
unlikely
certain
as likely as not
likely
6
Find the Mode: 2, 9, 14, 13, 24, 45, 6, 9, 5, 3
13
6
9
2
7
Theoretically, how many times will the spinner land on 3 when spun 56 times?
18
8
19
7
8
How can you determine the number of possible outcomes?
all of the above
multiply the number of items in each category
make a list
create a tree diagram
9
Determine whether the picture correctly displays the likelihood of drawing a marble.
incorrect
correct
10
In a standard deck (52 cards), what is the probability that the next card drawn will be a club?
1/4
1/52
1/13
13/52
11
What is the probability of not selecting peanut butter cups?
11/25
13/25
12/13
12/25
12
When calculating probability, divide the desired outcome, or what you want to happen, by ____.
the number of objects in your house
the total number of choices
half the sample space
the tree diagram
13
True or false: Theoretical probability always equals experimental probability.
False
True
14
You flip a coin. What is the theoretical probability it will land on heads?
0.5, 1/2, 50%
0.5, 1/2, 5.5%
0.05, 1/2, 50%
0.5, 2/2, 50%
15
When rolling two dice, what is the probability that both will land on a 3?
1/36
1/6
1/2
2/12
16
John draws a candy from the bowl. Which statement is true?
It is certain he will draw milk chocolate.
He is twice as likely to draw coconut than peanut butter.
He is less likely to draw coconut than peanut butter.
He has an equally likely chance of caramel and coconut.
17
If Sadie randomly draws one marble from a bag, which statement is true?
Sadie is less likely to take out a red marble than yellow.
Sadie is less likely to take out a blue marble than green.
Sadie is more likely to take out a blue marble than green.
Sadie is four times as likely to draw a blue than a green.
18
Write 3/40 as a percent.
5%
7.5%
13%
9%
19
They wanted to find the most common pizza that kids like. They asked every 7th person in lunch
Population
Sample
20
Write 13% as a decimal.
1.3
.013
.13
13.
21
If Helena randomly draws a crayon from the box, which statement is true?
Helena is less likely to draw blue than green.
Helena is more likely to draw yellow than red.
Helena is more likely to draw red than green.
Helena will not draw a red crayon.
22
As a fraction in simplest form, what's the probability a customer will order cheese or sausage?
2/5
4/10
1/3
12/30
23
Find the Median: 2, 9, 14, 13, 24, 45, 6, 9, 5, 3
13.5
18.75
5
9
24
If Jordy picked 1 crayon without looking, which color is he least likely to choose?
yellow
blue
red
green
25
You have 4 papers, 3 markers, and 2 stickers. How many different combinations can you make?
27
18
24
12
26
If you randomly choose an m&m, which statement would be true?
You are less likely to draw a red than a yellow.
You are two times more likely to draw a red than a blue.
You are twice as likely to draw a yellow than a green.
You are most likely to draw a yellow.
27
What is the likelihood you will draw an orange marble from the bag?
likely
as likely as not
unlikely
certain
28
When using a standard deck of playing cards (52 cards), which event is most likely?
drawing a queen
drawing a club
drawing the ace of hearts
drawing a red card
29
What is the probability of landing on a red space?
1/4
1/2
2/5
3/8
30
What percent of people prefer pepperoni pizza?
60%
50%
30%
87%
