SSC Statistics & Data Interpretation

Question 1

The mean of 5 observations is 10. If one observation of value 8 is added, what is the new mean?

Accepted Answer

9.67

Answer

Old sum = 5×10=50; new sum = 50+8=58; new mean = 58/6 ≈ 9.67.

Question 2

A pie chart shows that 25% of expenses are on food. If total expenses are Rs. 12,000, how much is spent on food?

Accepted Answer

Rs. 3,000

Answer

Food expenditure = 25% of 12,000 = 0.25 × 12,000 = Rs. 3,000.

Question 3

The mode of the data set {3, 5, 3, 7, 5, 3, 8} is:

Accepted Answer

3

Answer

Mode is the most frequently occurring value; 3 appears three times, more than any other value.

Question 4

In a bar graph, the sales for Jan, Feb, Mar, Apr are 40, 60, 50, 70 units respectively. What is the total sales for the quarter Jan-Mar?

Accepted Answer

150

Answer

Total sales for Jan-Mar = 40 + 60 + 50 = 150 units.

Question 5

What is the median of: 4, 7, 2, 9, 1, 5, 8?

Accepted Answer

5

Answer

Sorted: 1,2,4,5,7,8,9; median is the middle value (4th of 7) = 5.

SSC Practice Test