Question
What is the average of the squares of the first 23 natural
numbers?Solution
Sum of squares of first 'n' natural numbers = n × (n + 1) × (2n + 1) ÷ 6
So, average = n × (n + 1) × (2n + 1) ÷ 6n = (n + 1) × (2n + 1) ÷ 6
= (23 + 1) × (2 × 23 + 1) ÷ 6
= 24 × 47 ÷ 6
= 188
___________ refers to the degree of correlation of the same variables between two successive time intervals
Let X and Y be two related variables. The two regression lines are given by x-y+1=0 and 2x-y+4=0. The two regression lines pass through the point:
When we say that the estimator is BLUE. What does best signify here?
If bxy = 0.20 and rxy = 0.50, then byx is equal to:
Which of all the following is not an assumption of Marshall Consumer Theory of Demand?
Umar has the utility function U(b,w) = min (b,w) and Akshat has the utility function U(b,w) = bw. If we draw an Edgeworth box with b on the ho...
 The sum of squared deviation is minimum when taken from
For a positively sloped LM curve, which of the following statements is CORRECT?
Autocorrelated errors is about