DESCRIPTIVE STATISTICS
Most Important Numerical Problems
Solved Step by Step
University Exam Oriented
For:
BSc · BCom · Engineering (First Year)
Prepared by:
TeacherFrank10
, DESCRIPTIVE STATISTICS
MOST IMPORTANT NUMERICAL PROBLEMS
EXERCISE 1 – MEAN (FREQUENCY DATA)
Question
Calculate the arithmetic mean of the following data:
x: 10 20 30 40
f: 3 7 5 5
Formula
Mean (x̄ ) = Σfx / Σf
Solution
x f fx
10 3 30
20 7 140
30 5 150
40 5 200
Σf = 20
Σfx = 520
Mean = = 26
Most Important Numerical Problems
Solved Step by Step
University Exam Oriented
For:
BSc · BCom · Engineering (First Year)
Prepared by:
TeacherFrank10
, DESCRIPTIVE STATISTICS
MOST IMPORTANT NUMERICAL PROBLEMS
EXERCISE 1 – MEAN (FREQUENCY DATA)
Question
Calculate the arithmetic mean of the following data:
x: 10 20 30 40
f: 3 7 5 5
Formula
Mean (x̄ ) = Σfx / Σf
Solution
x f fx
10 3 30
20 7 140
30 5 150
40 5 200
Σf = 20
Σfx = 520
Mean = = 26
