Question Bank

The median of the data 13, 15, 16, 17, 19, 20 is:

Find the mean of first five odd prime numbers.

If $x_1, x_2...x_n$ are observations such that $\sum (x_i - 2) = 20$ and $\sum (x_i - 5) = -10$, then $n$ is:

Which measure is best for 'salary' distributions which are often skewed?

The class mark (mid-value) of 10-20 is:

Mean of $n$ observations is $\bar{x}$. If each is divided by 10, the new mean is:

If the mean of 6, 8, 5, 7, x and 4 is 7, then x is:

In a symmetric distribution, Mean - Median = ?

Calculate the median for: 40, 50, 30, 60, 80, 70.

If for a series, $\sum fx = 200$ and mean = 20, then $\sum f = $ ?

The mode of 12, 11, 15, 12, 14, 11, 12, 10, 15 is:

A cricketer has a mean score of 50 in 10 innings. How many runs must he score in the 11th inning to raise his mean to 55?

If the mean of $a, b$ is 10, and $b, c$ is 20, then $c-a$ is:

In the construction of a cumulative frequency table, we use:

The middle value of 5, 2, 8, 12, 4 is:

Find the mean of the first four perfect squares.

If the mean of 2, 3, x, 7, 8 is x, then x is:

Mode can be found from a histogram by looking at:

If the mean of 5 numbers is 0, their sum is:

Find the median of 10, 10, 10, 10, 10.