Math Chapter Wise question with answer

Q01 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 Q02 The mean and variance of 8 observations and 6 and 8 respectively. If some of these observations are 3, 5, 6, 8, 9,... English · OAVS TGT 2019 Q03 In an experiment with 15 observations on 'x' the following results are available ∑ ∑ ∑x2 = 2830, ∑ ∑x = 170. One ob... English · DSE TGT 2019 Q04 The variance of 20 observations is 5. If each observation is multiplied by 3 then variance for obtained observation... English · KVS PGT 23-12-2018 Q05 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 Q06 Numbers 1, 2, 3, 4, 5, 6, 7, 8, 9 and 10 are given. If 2 is added to each number, the variance of the number will b... English · KVS PGT 2022