Exercise 15.2

The diameters of circles (in mm) drawn in a design are given below:

Calculate the standard deviation and mean diameter of the circles. [Hint first make the data continuous by making the classes as $32.5-36.5,36.5-40.5,40.5-44.5,44.5-48.5,48.5-52.5$ and then...

Find the mean, variance and standard deviation using short-cut method

Solution:- Let us consider assumed mean, A = $92.5$ and h = $5$ Draw  the table of the given data and append other columns after calculations. Mean,...

Find the mean and variance for the following frequency distributions

Solution:- Draw the table of the given data and append other columns after calculations.

Find the mean and variance for the following frequency distributions

Solution:- Draw the table of the given data and append other columns after calculations.

Find the mean and variance for each of the data

Solution:- Draw  the table of the given data and append other columns after calculations.

Find the mean and variance for each of the data

Solution:- Draw  the table of the given data and append other columns after calculations.

Solution:- Let us take $10$ multiples of  $3$ are  $3,6,9,12,15,18,21,24,27,30$ We know that Mean = $\bar{X}=\sum\limits_{i=1}^{a}{{{x}_{i}}}$...