Data Interpretation and Statistics Practice

The mean of the five observations 12, 15, x, 20 and 18 is 17. What is the median of these observations?

The table shows the production (in thousand units) of three products of a company.
Year | A | B | C
2022 | 40 | 55 | 30
2023 | 45 | 60 | 35
2024 | 50 | 65 | 45
2025 | 60 | 70 | 50
By how many thousand units does the average annual production of B over the four years exceed the average annual production of C over the same years?

Study the table and answer the question.
School : Students appeared : Pass percentage
P : 480 : 75%
Q : 560 : 60%
R : 400 : 85%
S : 640 : 70%
What is the total number of students who passed from all four schools taken together?

The table shows wheat production (in lakh tonnes) of four states.
State : 2023 : 2024
P : 120 : 150
Q : 90 : 108
R : 150 : 165
S : 140 : 147
By how many lakh tonnes does the average production of the four states in 2024 exceed the average production in 2023?

What is the median of the following data?
23, 17, 31, 19, 28, 25, 14, 30

The table shows the number of male and female students enrolled in four coaching institutes.
Institute : Male : Female
A : 240 : 180
B : 300 : 210
C : 270 : 240
D : 260 : 190
The total number of female students in institutes A and C together is what percent of the total number of male students in institutes B and D together?

The table shows the number of laptops sold by four stores in two years.
Store: 2024, 2025
P: 240, 300
Q: 360, 420
R: 180, 270
S: 300, 360
The total sales of all four stores in 2025 is what percent of their total sales in 2024?

What is the range of the following data?
34, 27, 45, 19, 52, 38, 41

The table shows the number of male and female employees in four departments of a company.
Department | Male | Female
HR | 120 | 80
Finance | 150 | 90
IT | 300 | 200
Sales | 230 | 150
The total number of female employees is what percent of the total number of male employees?