Chapter Exam

Chapter-13 Connecting the Dots — Online MCQ Test

Q: What is the mean of the numbers 10, 20, 30, 40, and 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.

Q: Which measure of central tendency is also known as the average?

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.

Q: The marks of 5 students in a test are: 45, 52, 48, 52, 60. What is the median?

Answer: C. 52 — Arranging in order: 45, 48, 52, 52, 60. The middle value (3rd value) is 52.

Q: The dataset shows: 12, 15, 18, 21, 24. What is the relationship between mean and median?

Answer: C. Mean equals median — Mean = (12+15+18+21+24)/5 = 90/5 = 18. Median = 18 (middle value). For symmetric data, mean = median.

Q: 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?

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.

MATHS (KANITHA PRAKASH) · CLASS 7th · Karnataka State Board

Practice Chapter-13 Connecting the Dots with a free chapter-wise online MCQ test for Karnataka State Board CLASS 7th MATHS (KANITHA PRAKASH). This chapter covers: data representation - mean - median - mode - probability. AI-generated questions from basic to board-exam level, with instant results and explanations.

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Chapter-13 Connecting the Dots — Important Questions & Answers (FAQ)

Frequently asked questions from Karnataka State Board CLASS 7th MATHS (KANITHA PRAKASH) — Chapter-13 Connecting the Dots, with answers and explanations. These are sample questions; the exam has its own separate question set.

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.

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 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.

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.

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.