The weights (in kg) of 30 students of a class are grouped as: 40-44: 4, 44-48: 9, 48-52: 10, 52-56: 5, 56-60: 2. Using the step-deviation method with a = 50 and h = 4, find the mean weight (in kg).

Question

Accepted Answer

48.93. Class marks: 42,46,50,54,58. ui = -2,-1,0,1,2. fi*ui = 4*-2+9*-1+10*0+5*1+2*2 = -8-9+0+5+4 = -8. sum fi = 30. Mean = 50 + 4*-8/30 = 50 - 1.07 = 48.93.

The weights (in kg) of 30 students of a class are grouped as:
40-44: 4, 44-48: 9, 48-52: 10, 52-56: 5, 56-60: 2.
Using the step-deviation method with a = 50 and h = 4, find the mean weight (in kg).

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More Class 10 Mean of Grouped Data practice

The weights (in kg) of 30 students of a class are grouped as:40-44: 4, 44-48: 9, 48-52: 10, 52-56: 5, 56-60: 2.Using the step-deviation method with a = 50 and h = 4, find the mean weight (in kg).

Step-by-Step Solution

Master this chapter in 30 minutes a day.

More Class 10 Mean of Grouped Data practice

The weights (in kg) of 30 students of a class are grouped as:
40-44: 4, 44-48: 9, 48-52: 10, 52-56: 5, 56-60: 2.
Using the step-deviation method with a = 50 and h = 4, find the mean weight (in kg).