Measures of Dis...

If the coefficient of correlation between $$x,y$$ is $$0.7$$ and covariance is $$35$$ find the standard deviation of $$y$$ if the standard deviation of $$x$$ is $$5$$____.

The coefficient correlation between x and y is 0.8, the covariance being 20. If the standard deviation of x is 4 find the standard deviation of y___.

If Quartile deviation of a data is $$8$$, find Mean deviation____.

If a population has a standard deviation of $$2.25$$, how large the sample should be to allow a maximum error of $$0.33$$ with $$95\%$$ confidence level?

If the coefficient of correlation between x,y is 0.8 and covariance is 32 find the standard deviation of X if the standard deviation of y is 4___.

The standard deviation of sample of 30 observations is 1532. If the value of each item of the observation is increased by 5. The new standard deviation will be ______.

The sum of the deviation of the individual data elements from their mean is always_________.

Which of the following relations among the location parameters does not hold?

The median for the following distribution is

The standard deviation of $$5$$ items is found to be $$15$$. What will be the standard deviation if the values of all the items are increased by $$5$$?