Question
A random sample of size 225 is drawn from the
population of mean μ and standard deviation σ. The sample mean follows the distribution with mean 100 and standard distribution 4/3. The value of μ and σ are:Solution
The correct answer is A
If Z1, Z2,…Zn are n independent standard normal variates, then Σni=1 Z2i will follow:
The arithmetic mean of the following frequency distribution of number of accidents X on week working days is:
X:               �...
If the sum of lower and upper qualities is 6 and quartile deviation is 1.5, then the value of coefficient of quartile deviation is
Using the method of semi-averages, secular trend is measured when:
For the price -quantity chart
the Laspeyres price in...
If r and R denote correlation and multiple correlation coefficient for the data set for X1, X2 and X3 . Which option is correct?
The prices (in Rs.) for the commodity ABC,XYZ, MNO, and IJK in base year (2020) are 20, 18, 12, 24 and in current year (2022) are 25, 22, 15, 28 respec...
Which option is WRONG?
The median of the following observations 10, 11, 9, 12, 10,10, 12, 10, 9,11 is:
