Descriptive Sta...

Which of the following statements is untrue for tabulation?

Consider the following statements:
I. In a bar graph not only height but also width of each rectangle matters.
II. In a bar graph height of each rectangle matters and not its width
III. In a histogram the height as well as the width of each rectangle matters
IV. A bar graph is two dimensional
Of these statements:

The mean and standard deviation of a random variable $$x$$ is given by $$5$$ and $$3$$ respectively. The standard deviation of $$2-3x$$ is _____

Maximum number of teachers are in between which age group?

If $$\sum\limits_{i = 1}^{18} {({x_i} - 8) = 9} $$ and $$\sum\limits_{i = 1}^{18} {{{({x_i} - 8)}^2} = 45} $$, then standard deviation of $${x_1},{x_2},...,{x_{18}}$$ is

Solve:

Coefficient of skewnwss for the value $$Median = 18.8,{Q_1} = 14.6,{Q_3} = 25.2$$ is

The variance of the data $$6,\ 8,\ 10,\ 12,\ 14,\ 16,\ 18,\ 20,\ 22,\ 24$$ is

Use the graph to answer the question.How many students have more than 100 rupees? 

If $$V$$ is the variance and $$M$$ is the mean of first $$15$$ natural numbers, then what is $$V+M^2$$ equal to ?