Praxis CKT Math Data and Probability Quiz

1. The five-number summary of a dataset is 10, 20, 30, 40, 50. What is the interquartile range?

10

20

30

40

2. A box contains 4 red balls and 6 blue balls. Without replacement, what is the probability of drawing two red balls in a row?

4/10 × 3/9

4/10 × 4/10

6/10 × 5/10

2/10

3. Which sampling method is most likely to introduce bias?

Random sampling

Stratified sampling

Convenience sampling

Systematic sampling

Submit

5. If P(rain tomorrow) = 0.6, what is the probability it does not rain?

0.3

0.4

0.5

0.6

6. In a normal distribution, approximately 95% of data falls within how many standard deviations of the mean?

1

2

3

4

Submit

8. A dataset has values 5, 5, 5, 10, 15. What is the mode?

5

8

10

15

9. If you roll a six-sided die twice, how many possible outcomes are there?

6

12

24

36

Submit

11. A dataset contains the values 8, 12, 15, 20, and 25. What is the mean?

14

16

18

20

12. A deck has 52 cards. What is the probability of drawing a heart?

1/13

1/4

1/2

4/13

13. Which type of graph is best for showing how parts relate to a whole?

Line graph

Pie chart

Histogram

Scatter plot

14. A dataset has a standard deviation of 5. What does this indicate about the data?

The mean is 5

Values typically vary 5 units from the mean

The range is 5

Half the data is above 5

15. If event A has probability 0.4 and event B has probability 0.3, and they are independent, what is P(A and B)?

0.12

0.7

0.12

0.55

16. A bar graph shows sales data for four quarters. The heights are 50, 70, 65, and 45. What is the range?

20

25

30

35

17. Two fair coins are flipped. What is the probability of getting at least one heads?

1/4

1/2

2/3

3/4

18. A spinner has 8 equal sections: 3 red, 2 blue, 2 green, 1 yellow. What is the probability of spinning red?

1/8

3/8

3/5

1/3

19. If the median of five numbers is 10, which statement must be true?

The mean is also 10

The middle value is 10

Two values are above 10

The mode equals 10

20. Which measure of central tendency is most affected by extreme outliers?

Mode

Median

Mean

Range

Praxis CKT Math Data and Probability Quiz

1. The five-number summary of a dataset is 10, 20, 30, 40, 50. What is the interquartile range?

2.

What first name or nickname would you like us to use?

2. A box contains 4 red balls and 6 blue balls. Without replacement, what is the probability of drawing two red balls in a row?

3. Which sampling method is most likely to introduce bias?

4. A frequency table shows that 15 students scored an A, 20 scored a B, and 10 scored a C. The relative frequency for B is ____.

5. If P(rain tomorrow) = 0.6, what is the probability it does not rain?

6. In a normal distribution, approximately 95% of data falls within how many standard deviations of the mean?

7. A histogram shows the distribution of test scores. The x-axis represents ____.

8. A dataset has values 5, 5, 5, 10, 15. What is the mode?

9. If you roll a six-sided die twice, how many possible outcomes are there?

10. A scatter plot shows a strong negative correlation. As x increases, y ____.

11. A dataset contains the values 8, 12, 15, 20, and 25. What is the mean?

12. A deck has 52 cards. What is the probability of drawing a heart?

13. Which type of graph is best for showing how parts relate to a whole?

14. A dataset has a standard deviation of 5. What does this indicate about the data?

15. If event A has probability 0.4 and event B has probability 0.3, and they are independent, what is P(A and B)?

16. A bar graph shows sales data for four quarters. The heights are 50, 70, 65, and 45. What is the range?

17. Two fair coins are flipped. What is the probability of getting at least one heads?

18. A spinner has 8 equal sections: 3 red, 2 blue, 2 green, 1 yellow. What is the probability of spinning red?

19. If the median of five numbers is 10, which statement must be true?

20. Which measure of central tendency is most affected by extreme outliers?