Analysis of Frequency Distributions

From the following, find which series is more consistent:

Weekly average wages of workers in a factory increase from $₹ 80 \mathrm{to} ₹ 120$ and standard deviation increases from $₹ 10 \mathrm{to} ₹ 30$. Have the wages become less uniform now?

Find the coefficient of variation for the following data:

(Write the answer upto two decimal places.)

Find the coefficient of variation for the following data:

(Write the answer upto two decimal places.)

Calculate the coefficient of variation from the following data:

(write the answer up to two decimal places.)

Find the coefficient of variation for the following data:

(Write your answer up to two decimal places.)

Coefficients of variation of two distributions are $60$ and $70,$ and their standard deviations are $21$ and $16$ respectively. What are their arithmetic means?

The mean and standard deviation of $\mathrm{heights}$ and $\mathrm{weights}$ of $50$ students of a class are as follows:

Which shows more variability, $\mathrm{heights}$ or $\mathrm{weights}?$

Two plants $A$ and $B$ of a factory show the following results about the number of workers and the wages paid to them:

In which plant, $A$ or $B$ is there greater variability in individual wages?

If the variance of monthly wages paid to workers by two firms A and B are $100$ and $81$ respectively and if the firms have same average monthly wages, then which firms shows greater variability in individual wages?

If the coefficient of variation of a distribution is $75$ and standard deviation is $27,$ then what is the arithmetic mean?

If the coefficients of variation of two distributions are $40$ and $20$ and their variances are $144$ and $64$ respectively, then the mean of their arithmetic means is

What is the formula for finding co-efficient of variation, given $\sigma =$ standard deviation and $\overline{x}=$mean $\ne 0?$

The temperature of two cities $A$ and $B$ in a winter season are given in the table.

Find which city is more consistent in temperature changes?

Coefficient of variation = $\frac{SD}{Mean}\times$_____