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2023 Year 8 Statistics and Probability CAT Revision Flashcards | StudBud
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2023 Year 8 Statistics and Probability CAT Revision
2023 Year 8 Statistics and Probability CAT Revision
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1
What is an example of a census?
Select five students to do a mock test.
Collect feedback on safety issues from 3000 residents in the community.
Ask all the year 8 students about their preferred subjects for 2024.
Every 50th chocolate bar sample is tested.
2
What is the complementary probability of selecting a heart card?
13/52
1/2
1/4
3/4
3
What is the probability of having a chocolate scoop with nuts?
2/9
4/12
1/6
1/3
4
This Venn diagram shows the sports that students play after school. How many students were surveyed?
14
29
11
30
5
A data set includes 2, 2, 11, 4, 1. What is the median?
4
5
11
2
6
If one student is chosen at random, what is the probability of a student who plays hockey but not gymnastics?
15/29
11/29
3/29
5/29
7
A survey is conducted about 10 football players' annual incomes. What type of data has been collected?
Numerical - discrete
Categorical - ordinal
Categorical - nominal
Numerical - continuous
8
A survey is conducted about Year 8 students' favourite sports. What type of data has been collected?
Numerical - discrete
Categorical - nominal
Numerical - continuous
Categorical - ordinal
9
What is the probability of selecting a red Ace from a deck of play cards?
1/2
13/52
2/52
1/4
10
What is this data display?
Frequency table
Dot plot
Stem-and-leaf plot
Histogram
11
A data set includes 2, 2, 11, 4, 1. What is the mode?
5
11
4
2
12
If Pr (picking a RF) is 0.5 and Pr (picking a BF) is 0.3, what is the probability of picking a yellow flower?
0.8
0.2
0.4
1
13
This tree diagram shows the combinations of choices for ice cream. How many possible combinations are there?
96
9
18
12
14
Which is NOT a sampling method?
Stratified Sampling
Systematic Sampling
Random Sampling
Selection Sampling
15
A data set includes 2, 2, 11, 4, 1. What is the outlier?
2
5
4
11
16
A data set includes 2, 2, 11, 4, 1. What is the mean?
5
11
4
2
17
A data set includes 2, 2, 11, 4, 1. If the outlier is removed, which would be affected?
mean
median
mode
range
18
A data set includes 2, 2, 11, 4, 1. What is the range?
7
10
4
9
19
What is the probability of selecting a red card from a deck of play cards?
1/2
1/4
13/52
1/52
