alleryIf sum of x = 50, sum of y = 80, n = 10, then mean of x and y are
A(10, 10)
B(8, 5)
C(5, 8)
D(50, 80)
Answer & Solution
Correct answer: C. (5, 8)
1. xbar = (sum x) / n = 50 / 10.
2. = 5.
3. ybar = (sum y) / n = 80 / 10 = 8.
4. So means are (5, 8).
_Source: ICAI BoS Foundation Paper 3, Ch 17 'Regression', p.6_
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