Consider the following distribution of daily wages of 150 workers of a factory. Find the
mean daily wages by step deviation method.
Daily Wages (in Rs ): 20−30; 30 −40; 40 −50; 50 −60; 60 −70
Number of workers: 25; 40; 42; 33; 10
Answers
Answer:
42.533
Step-by-step explanation:
20 - 70 => (20 +70)/2 = 45
Class interval = 10
Interval middle frequency middle - 45 (middle -45)/10 fi * ui
20 -30 25 25 -20 -2 -50
30 -40 35 40 -10 -1 -40
40 -50 45 42 0 0 -0
50 -60 55 33 10 1 33
60 -70 65 10 20 2 20
150 -37
45 + 10 * (-37/150)
= 45 - 2.467
= 42.533