Statistics Part 1
© examsiri.com
Question : 76 of 100
Marks:
+1,
-0
The mean of a set of 30 observations is 75.If each observation is multiplied by a non-zero number λ and then each of them is decreased by 25, their mean remains the same. Then λ is equal to :
[Main 15 April 2018 S1]
Go to Question: