BKSB Data and Statistical Interpretation 2

Question 1

A bar chart shows monthly sales: Jan=120, Feb=95, Mar=140, Apr=110. What is the range of these values?

Accepted Answer

45

Answer

Range = highest minus lowest = 140 − 95 = 45.

Question 2

A pie chart shows that 25% of students prefer science. If there are 200 students total, how many prefer science?

Accepted Answer

50

Answer

25% of 200 = 0.25 × 200 = 50 students.

Question 3

A line graph shows temperatures rising from 10°C to 22°C over 6 days. What is the average daily increase?

Accepted Answer

2°C

Answer

Total increase = 22 − 10 = 12°C over 6 days, so average = 12 ÷ 6 = 2°C per day.

Question 4

The following data set shows ages: 14, 16, 18, 20, 22, 24, 26. What is the median age?

Accepted Answer

20

Answer

With 7 ordered values, the median is the 4th value = 20.

Question 5

A frequency table shows 5 students scored 60, 8 scored 70, and 7 scored 80. What is the modal score?

Accepted Answer

70

Answer

The mode is the score that appears most frequently — 70 was scored by 8 students.

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