Higher Physics : Practice Questions and Answers

If mean=10, median=8 and standard deviation=6, then coefficient of skewness is:

If mean=20, median=16 and standard deviation=2, then coefficient of skewness is:

If mean=25, median=30 and standard deviation=15, the distribution will be:

If mean=50, mode=40 and standard deviation=5, the distribution is:

For a symmetrical distribution:

For a positively skewed distribution, mean is always:

The lack of uniformity or symmetry is called:

Departure from symmetry is called:

If the third moment about mean is zero, then the distribution is:

If the third central is negative, the distribution will be:

The first three moments of a distribution about the mean are 1, 4 and 0. The distribution is:

First two moments about the value 2 of a variable are 1 and 16. The variance will be:

The first moment about X = 0 of a distribution is 12.08. The mean is:

Moment ratios β1 and β2 are:

The first and second moments about arbitrary constant are -2 and 13 respectively, The standard deviation will be:

The second moment about arithmetic mean is 16, the standard deviation will be:

All odd order moments about mean in a symmetrical distribution are:

The moments about origin are called:

Which of the following measures of dispersion is independent of the units employed?

If = Rs.20, S= Rs.10, then coefficient of variation is: