The following table gives the information of frequency distribution of weekly wages of 150 workers of a company. Find the mean of the weekly wages by 'step deviation' method.
Weekly wages (Rupees) No. of workers.
1000-2000 : 25
2000-3000 : 45
3000-4000 : 50
4000-5000 : 30
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Answer:
3066.67
Step-by-step explanation:
Class Frequency Mean u=(Mean - 3500)/1000 fu
1000-2000 25 1500 -2 -50
2000-3000 45 2500 -1 -45
3000-4000 50 3500 0 0
4000-5000 30 4500 1 30
150 -65
Mean = 3500 + (-65/150) * 1000
= 3500 - 433.33
= 3066.67
he mean of the weekly wages by 'step deviation' method. = 3066.67
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