The mean of 100 observations is 50 and their standard deviation is 5 . The sum of squares…
Mathematics · JEE Main · NTA Exams — Statistics and Probability
The mean of 100 observations is 50 and their standard deviation is 5 . The sum of squares of all observations is
- 50000
- 250000
- 252500
- 255000
Answer
(C) 252500
Sign up free on Edukali to view the step-by-step worked solution and practice thousands of similar questions.
Related practice questions
- Let A and B be two independent events such that P(A)= 1 3 and P(B)= 1 6 . Then which of the following is TRUE?
- Let x 1 , x 2 ......, x n be n observations. Let _ i = x _ i + k for i = 1, 2,.........,n, where l and k are…
- Five coins are tossed simultaneously. The probability of the event that at least one tail turns up, is
- If the arithmetic mean of the numbers x 1 , x 2 , x 3 ,...........,x n is , then the arithmetic mean of…
- A person throws two fair dice. He wins Rs. 15 for throwing a doublet (same numbers on the two dice), wins Rs…
- A certain player, say X, is know to win with probability 0.3 if the track is fast and 0.4 if the track is…
- Let A and B be two events such that the probability that exactly one of them occurs is 2 5 and the…
- x 1 , x 2 , x 3 , ...... x 50 are fifty numbers such that x r r + 1 for r = 1, 2, 3, ...., 49 . Five numbers…
More Statistics and Probability questions · Browse all practice questions