Math Chapter Wise question with answer

Q01 The mean of 100 observations is 50 and their standard deviation is 5. The sum of squares of all observations is– English · KVS TGT 2017 Q02 If the mean and standard deviation of 100 items are 50 and 4 respectively, then the sum of the product of squares o... English · KVS PGT 23-12-2018 Q03 The weighted mean of first n natural numbers whose weights are equal to the square of the corresponding number is English · Rajasthan TGT 2016 Q04 If Σ Σ Σƒ ƒ ƒi xi = 3100, Σ Σ Σƒ ƒ ƒi (xi – x)2 = 10050 and n = 50, then the variance is: English · KVS PGT 2023 Q05 The mean of 5 observations is 4 and their variance is 5.2. If three of those observations are 1, 2 and 6 the other... English · KVS PGT 2023 Q06 The variance of the observations 13, 17, 10, 20, 16 and 14 is: English · NVS PGT 2022