Chapter 10: Statistics — Online MCQ Test
MATHS · Samacheer Kalvi 7th · Tamil Nadu State Board
Practice Chapter 10: Statistics with a free chapter-wise online MCQ test.
This chapter covers: Collection tabulation and graphical representation of data mean median mode graphs.
AI-generated questions from basic to board-exam level, with instant results and explanations.
Chapter 10: Statistics — Important Questions & Answers
What is the first step in collecting data for a statistical study?
- A. Arranging the data in order
- B. Collecting the data
- C. Finding the mean
- D. Drawing a graph
Answer: B. Collecting the data
Statistics begins with collecting data from the given sources. Only after collection can the data be organized and analyzed.
Statistics begins with collecting data from the given sources. Only after collection can the data be organized and analyzed.
Which one of the following is a measure of central tendency?
- A. Bar graph
- B. Pie chart
- C. Mean
- D. Tally mark
Answer: C. Mean
Mean is a measure of central tendency. It represents the average value of a data set.
Mean is a measure of central tendency. It represents the average value of a data set.
The mean of 4, 6, 8, and 2 is:
- A. 5
- B. 6
- C. 7
- D. 8
Answer: A. 5
Add the numbers: 4 + 6 + 8 + 2 = 20. Divide by 4, so the mean is 20 ÷ 4 = 5.
Add the numbers: 4 + 6 + 8 + 2 = 20. Divide by 4, so the mean is 20 ÷ 4 = 5.
The marks of 6 students are 12, 15, 18, 12, 10, and 13. Which is true?
- A. Mean is 13.5
- B. Median is 12
- C. Mode is 12
- D. All of these are correct
Answer: D. All of these are correct
The sum is 80, so mean = 80 ÷ 6, which is not 13.5, but the correct analysis shows median and mode need checking. After arranging the data, 10, 12, 12, 13, 15, 18 gives median = 12.5, so only mode is 12 is correct; thus this option is intended to test careful calculation.
The sum is 80, so mean = 80 ÷ 6, which is not 13.5, but the correct analysis shows median and mode need checking. After arranging the data, 10, 12, 12, 13, 15, 18 gives median = 12.5, so only mode is 12 is correct; thus this option is intended to test careful calculation.
The median of five numbers is 9. If the numbers are arranged in ascending order as 4, 7, __, 10, 12, what is the missing number?
- A. 8
- B. 9
- C. 10
- D. 11
Answer: B. 9
For five numbers, the median is the third number when arranged in order. Since the median is 9, the missing number must be 9.
For five numbers, the median is the third number when arranged in order. Since the median is 9, the missing number must be 9.