Measures of Central Tendency Test - 3

The sum of the values of all observations divided by the number of observations. Mean = ∑X / N

Quartiles are the measures which divide the data into four equal parts, each portion contains equal number of observations. Thus, there are three quartiles, Q1,Q2and Q3.

The value of mode can be determined by the both methods of inspection method & grouping method in discrete series.

In a normal distribution in which the values of mean, median and mode coincide, (i.e. mean = median = mode) is known as asymmetrical distribution. Mode=3 Median-2 Mean

Percentiles divide the distribution into hundred equal parts, so you can get 99 dividing positions denoted by P1, P2, P3, ..., P99.

A symmetric distribution is a type of distribution where the left side of the distribution mirrors the right side. In a symmetric distribution, the mean, mode and median all fall at the same point.

A distribution is negatively skewed the mean is usually lesser than the median and Median is lesser than Mode.

The mode of a set of data is the value in the set that occurs most often.

Quartiles are the measures which divide the data into four equal parts, each portion contains equal number of observations.