InterviewSolution
Saved Bookmarks
InterviewSolution
| 1. |
Let x1, x2, ……xn, be n observations. Let yi = axi + b for I = 1, 2, ….., n, where a and b are constant. If the mean of is 48 and their standard deviation is 12, the mean of y'si is 55 and standard deviation of y'si is 15, the values of a and b are A. a = 1.25, b = -5 B. a = -1.25, b = 5C. a = 2.5, b = -5 D. a = 2.5, b = 5 |
|
Answer» Mean(y) = a.mean(x) + b Therefore, 55 = a.48 + b We can see that only first option satisfies this equation. Therefore, a is the correct answer. |
|