Chapter-7 Statistics — Online MCQ Test
MATHS · Samacheer Kalvi 8th · Tamil Nadu State Board
Practice Chapter-7 Statistics with a free chapter-wise online MCQ test.
This chapter covers: mean median mode graphs Covers collection tabulation and graphical representation of data.
AI-generated questions from basic to board-exam level, with instant results and explanations.
Chapter-7 Statistics — Important Questions & Answers
What is the measure of central tendency that is obtained by adding all observations and dividing by the number of observations?
- A. Mode
- B. Median
- C. Mean
- D. Range
Answer: C. Mean
The mean is calculated by dividing the sum of all observations by the number of observations.
The mean is calculated by dividing the sum of all observations by the number of observations.
Which of the following is the middle value of an arranged data set?
- A. Mean
- B. Median
- C. Mode
- D. Frequency
Answer: B. Median
The median is the middle value when the data are arranged in ascending or descending order.
The median is the middle value when the data are arranged in ascending or descending order.
The ages of 5 students are 12, 13, 12, 14, 11. What is the mean age?
- A. 11
- B. 12
- C. 12.4
- D. 13
Answer: C. 12.4
Mean = (12 + 13 + 12 + 14 + 11) ÷ 5 = 62 ÷ 5 = 12.4.
Mean = (12 + 13 + 12 + 14 + 11) ÷ 5 = 62 ÷ 5 = 12.4.
A bar graph uses a scale of 1 unit = 5 students. If a bar has height 6 units, how many students does it represent?
- A. 11
- B. 20
- C. 30
- D. 35
Answer: C. 30
Since 1 unit represents 5 students, 6 units represent 6 × 5 = 30 students.
Since 1 unit represents 5 students, 6 units represent 6 × 5 = 30 students.
The mean of 5 numbers is 14. Four of the numbers are 12, 15, 13, and 16. What is the fifth number?
- A. 12
- B. 14
- C. 15
- D. 16
Answer: B. 14
Total of 5 numbers = 14 × 5 = 70. Sum of given 4 numbers = 56, so the fifth number = 70 - 56 = 14.
Total of 5 numbers = 14 × 5 = 70. Sum of given 4 numbers = 56, so the fifth number = 70 - 56 = 14.