Chapter-13 Connecting the Dots — Online MCQ Test
MATHS · Grade 7 · CBSE(NCERT)
Practice Chapter-13 Connecting the Dots with a free chapter-wise online MCQ test.
This chapter covers: data representation - mean - median - mode - probability.
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Chapter-13 Connecting the Dots — Important Questions & Answers
What is the mean of the numbers 10, 20, 30, 40, and 50?
- A. 20
- B. 30
- C. 40
- D. 50
Answer: B. 30
Mean = (10+20+30+40+50)/5 = 150/5 = 30. Mean is the sum of all values divided by the count of values.
Mean = (10+20+30+40+50)/5 = 150/5 = 30. Mean is the sum of all values divided by the count of values.
Which measure of central tendency is also known as the average?
- A. Median
- B. Mode
- C. Mean
- D. Range
Answer: C. Mean
The mean is calculated as the sum of all values divided by the number of values, and is commonly called the average.
The mean is calculated as the sum of all values divided by the number of values, and is commonly called the average.
The marks of 5 students in a test are: 45, 52, 48, 52, 60. What is the median?
- A. 48
- B. 51.4
- C. 52
- D. 60
Answer: C. 52
Arranging in order: 45, 48, 52, 52, 60. The middle value (3rd value) is 52.
Arranging in order: 45, 48, 52, 52, 60. The middle value (3rd value) is 52.
The dataset shows: 12, 15, 18, 21, 24. What is the relationship between mean and median?
- A. Mean is greater than median
- B. Mean is less than median
- C. Mean equals median
- D. Mean and median are unrelated
Answer: C. Mean equals median
Mean = (12+15+18+21+24)/5 = 90/5 = 18. Median = 18 (middle value). For symmetric data, mean = median.
Mean = (12+15+18+21+24)/5 = 90/5 = 18. Median = 18 (middle value). For symmetric data, mean = median.
In a dataset with values 10, 10, 10, 10, 20, the mean is 12 but the mode is 10. Why is the mode more representative of the typical value?
- A. Because the mode appears most frequently
- B. Because one outlier (20) skews the mean
- C. Both A and B are correct
- D. The mean is always better than mode
Answer: C. Both A and B are correct
The mode (10) appears 4 times out of 5, while the single value 20 pulls the mean up to 12, making mode more representative of the typical value in this case.
The mode (10) appears 4 times out of 5, while the single value 20 pulls the mean up to 12, making mode more representative of the typical value in this case.