Q1: 1. What is the median of the following set of data: 12, 15, 18, 20, 22?

• A) 15
• B) 18
• C) 20
• D) 22

Q2: 2. Which measure of central tendency is most affected by outliers?

• A) Mean
• B) Median
• C) Mode
• D) Range

Q3: 3. What is the mode of the following set of data: 5, 7, 8, 8, 9, 10?

• A) 7
• B) 8
• C) 9
• D) 10

Q4: 4. If the mean of a data set is 25 and there are 5 data points, what is the sum of all the data points?

• A) 100
• B) 125
• C) 150
• D) 175

Q5: 5. In a survey, 25 students were asked how many siblings they have. The results were: 0, 1, 2, 2, 3, 3, 3, 4, 4, 5. What is the range of the data?

• A) 3
• B) 4
• C) 5
• D) 6

Q6: 6. If the mean of a set of data is 30 and one data point is 20, what must another data point be in order to keep the mean at 30?

• A) 30
• B) 35
• C) 40
• D) 50

Q7: 7. Which of the following is a measure of dispersion?

• A) Mean
• B) Mode
• C) Median
• D) Range

Q8: 8. If a class has 20 students and 25% of them are left-handed, how many students are left-handed?

• A) 2
• B) 5
• C) 10
• D) 15

Q9: 9. What is the median of the following set of data: 2, 4, 6, 8, 10, 12, 14?

• A) 6
• B) 8
• C) 10
• D) 12

Q10: 10. In a survey of 30 people, 20 preferred vanilla ice cream, 5 preferred chocolate, and 5 preferred strawberry. What is the mode of the data?

• A) Vanilla
• B) Chocolate
• C) Strawberry
• D) None of the above

Q11: 11. If the mode of a data set is 12 and the median is 15, what is the mean of the data set?

• A) 12
• B) 13
• C) 14
• D) 15

Q12: 12. A survey of 50 students found that 10 students preferred math, 20 preferred science, 15 preferred art, and 5 preferred music. What percentage of students preferred science?

• A) 20%
• B) 30%
• C) 40%
• D) 50%

Q13: 13. If the range of a set of data is 12 and the smallest data point is 5, what is the largest data point?

• A) 12
• B) 13
• C) 17
• D) 20

Q14: 14. Which of the following is a measure of central tendency?

• A) Variance
• B) Standard Deviation
• C) Range
• D) Mean

Q15: 15. If the mean of a set of data is 40 and one data point is 30, what must another data point be in order to keep the mean at 40?

• A) 40
• B) 50
• C) 60
• D) 70

Q16: 16. What is the mode of the following set of data: 3, 5, 7, 7, 8, 9, 9?

• A) 5
• B) 7
• C) 8
• D) 9

Q17: 17. If the mean of a set of data is 50 and one data point is 60, what must another data point be in order to keep the mean at 50?

• A) 40
• B) 45
• C) 50
• D) 55

Q18: 18. In a survey of 50 people, 20 preferred tea, 15 preferred coffee, and 15 preferred juice. What is the mode of the data?

• A) Tea
• B) Coffee
• C) Juice
• D) None of the above

Q19: 19. What is the median of the following set of data: 4, 8, 12, 16, 20?

• A) 8
• B) 12
• C) 14
• D) 16

Q20: 20. If the mode of a data set is 5 and the median is 6, what is the mean of the data set?

• A) 5
• B) 6
• C) 7
• D) 8

Q21: 21. A class has 30 students and 20% of them are girls. How many students in the class are girls?

• A) 6
• B) 12
• C) 15
• D) 18

Q22: 22. What is the range of the following set of data: 10, 15, 20, 25, 30?

• A) 15
• B) 20
• C) 25
• D) 30

Q23: 23. If the mean of a set of data is 60 and one data point is 70, what must another data point be in order to keep the mean at 60?

• A) 50
• B) 55
• C) 60
• D) 65

Q24: 24. Which of the following is a measure of variability?

• A) Mean
• B) Mode
• C) Median
• D) Range

Q25: 25. If the mode of a data set is 8 and the median is 10, what is the mean of the data set?

• A) 8
• B) 9
• C) 10
• D) 11