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Probability & Statistics (Grade 9 Unit 9) Flashcards | StudBud
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Probability & Statistics (Grade 9 Unit 9)
Probability & Statistics (Grade 9 Unit 9)
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#9 Math #SPJH #Probability #Statistics
Flashcards
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Questions
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Answers
1
I want to find out what percent of students in my school like pizza. What's the best sample?
Ask all the boys in my school
Ask all students in Home Economic class
Ask students in the cafeteria on pizza day.
Ask 5 boys and 5 girls from each class
2
What sampling method is described below?
Stratified Random Sampling
Simple Random Sampling
Convenience Sampling
Interval Sampling
3
What is the probability of landing on BLUE
20 %
50 %
16.7 %
83.3 %
4
What is the probability of getting BLUE?
40%
16 %
25 %
4 %
5
The Vipers won all games this year. They expect to win next. What is NOT a related assumption?
The crowd who come to watch is 40% men and 60% women
Their coach is not sick
Court conditions are as good as they have been all season
The opposing team is not better than others they've played
6
Mary thinks she has a 50% of winning a coin toss. This is...?
Experimental Probability
Subjective Judgement
Theoretical Probability
7
Write this fraction as a percent
25%
30%
33.3...%
28.57%
8
The sample chosen was every 20th person entering a Romance movie? What sampling method is this?
Self-Selected Sampling
Simple Random Sampling
Stratified Random Sampling
Systematic Interval Sampling
9
I want to find how many of 30 students need help with their homework. Should I do a...
Census
Sample
10
I want to find out how many cars drive down my street each day. What would be the best sample?
Count cars that drive by in 20 minute intervals every hour
Count cars that drive by from 8 PM to 9 PM
Count cars that drive by from 8 AM to 9 AM
Watch for 24 hours and count every car that drives by
11
What sampling method is described below?
Self-Selected Sampling
Stratified Random Sampling
Convenience Sampling
Interval Sampling
12
Write as a fraction in lowest terms
0.26
26 / 100
13 / 50
1 / 3
13
A car factory needs to test it's seat belts. Should they do a...
Sample
Census
14
What sampling method is described below?
Simple Random Sampling
Interval Sampling
Stratified Random Sampling
Convenience Sampling
15
What sampling method is described below?
Cluster Sampling
Interval Sampling
Self-Selected Sampling
Stratified Random Sampling
16
What is the experimental probability of getting Red OR Green?
15 %
10 %
73 %
40 %
17
The sample chosen was every 20th person entering a Romance movie? Are these results valid?
No
Yes
18
DJ was late every day this year. His teacher predicts he'll be late tomorrow. This is...?
Experimental Porbability
Subjective Judgement
Theoretical Probability
19
What percent of people surveyed prefer Comedy movies?
40 %
4 %
50 %
20 %
20
Which represents the amount of cake remaining?
1 / 4
3 / 4
0.25
25 %
21
What is the probability of landing on an EVEN number?
0.2
0.5
0.16
1
22
I ask my class to raise their hand if they failed the last test. This is a...
Privacy problem
Timing problem
Use of language problem
Cost problem
23
What sampling method is described below?
Stratified Random Sampling
Simple Random Sampling
Interval Sampling
Cluster Sampling
24
I want to find out how many of the 500 students in my school want a pajama day. Should I do a;
Census
Sample
25
I got 100 on all tests this year. I expect 100 on the next. Which is NOT an assumption I make?
I studied the same amount for all tests
The cafeteria is serving hot dogs that day
All tests are equally difficult
I am feeling as well as I did for the other tests
26
What sampling method is described below?
Simple Random Sampling
Cluster Sampling
Convenience Sampling
Systematic Interval Sampling
27
I want to find out how many students at my school like volleyball. What is the population?
All students who are on a volleyball team
All students in my class
All students in my city
All students who go to my school
28
What percent of people surveyed like Romance movies?
60 %
13 %
6 %
30 %
29
How many people were surveyed in this study?
40
10
100
20
30
What is the probability of landing on a FACTOR of 6? Answer in simplest form.
1/3
1/6
2/3
1
31
I ask my class "Do you prefer boring country music or exciting rock music?". This is a...
Use of language problem
Timing problem
Privacy problem
Cost problem
32
I ask my class who their favorite hockey team is the day after Montreal wins the cup. This is a
Cost problem
Timing problem
Cultural sensitivity problem
Time problem
33
What is the experimental probability of getting yellow?
1/5
11/25
7/11
11/15
34
Which represents this set of numbers?
100, 0.5, 0.25, 0.75
100%, 50%, 25%, 75%
1, 1.2, 1.4, 3.4
1%, 50%, 25%, 75%
35
What is the probability of landing on a 7?
7
1
1/2
0
36
I send a survey out to all families in my school community by mail. This is a...
Cost problem
Cultural sensitivity problem
Timing problem
Use of language problem
37
I ask my students what they got for Christmas. This is a...
Cultural Sensitivity problem
Use of language problem
Time problem
Timing problem
38
How many people like Drama OR SciFi?
1
20
5
4
39
What is the probability of landing on a PERFECT SQUARE Number?
1 / 2
1 / 6
1 / 3
2 / 3
40
I ask my students to do an hour long survey during their lunch break. This is a...
Time problem
Use of language problem
Timing problem
Privacy problem
