Statistics

Gap-fill exercise

  
Fill in all the gaps, then press "Check" to check your answers. Use the "Hint" button to get a free letter if an answer is giving you trouble. You can also click on the "[?]" button to get a clue. Note that you will lose points if you ask for hints or clues!
The of observations, is the sum of the values of all the observations divided by the total number of observations.

A is that value among the observations which occurs most often, that is, the value of the observation having the maximum frequency.

The is a measure of central tendency which gives the value of the middle-most observation in the data.

The can also be calculated for grouped data with unequal class sizes.

3 Median = + 2 .

The median of grouped data with can also be calculated.

An is a shape consisting of a concave arc flowing into a convex arc, so forming an S-shaped curve with vertical ends.

The of a class is the frequency obtained by adding the frequencies of all the classes preceding the given class.

The of a frequency distribution can be determined graphically from ogive.

Mode is the frequent value.

The algebraic sum of the deviations of a frequency distribution from its mean is always .

The A.M. of a set of 50 numbers is 38. If two numbers of the set namely 55 and 45 are discarded, the A.M. of the remaining set of numbers is .

If x is the mean of a distribution, then Σfi(xi – x) is equal to .

If Σfi = 11, Σfixi = 2p + 52 and the mean of any distribution is 6, then the value of p=.

A set of numbers consists of four 5’s, six 7’s, ten 9’s, eleven 12’s, three 13’s, two 14’s. The mode of this set of numbers is .

The mode of the numbers 2, 3, 4, 4. 3, 5, 3, 6 is .

There are types of cumulative frequency curve.