Question

X bar =25.857, sigma fidi =120, sigma fi =140, a=?
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Answer 1

Answer:

By formula

X bar = a+(£fidi/£fi)

i.e. 25.857 = a+ (120/140)

i.e 25.857 = a + 0.857

i.e. 25.857 -0.857 = a

i.e. a = 25

Therefore a is 25 for X bar =25.857, sigma fidi =120, sigma fi =140

Answer 2

Answer:

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