by kasi | Jun 1, 2010 | Descriptive statistics
The arranged data can be divided into ten equal parts by nine values. These values are called deciles and denoted by D1, D2,…….D9. Two different types of formulas are used for the calculation of deciles in case of grouped data (data presented in frequency... by kasi | Jun 1, 2010 | Descriptive statistics
The arranged data can be divided into four equal parts by three values. These values are called quartiles and are denoted by Q1, Q2 and Q3. Here Q1 is first quartile, Q2 is second quartile and Q3 is third quartile. Calculation of quartiles for ungrouped data... by kasi | Jun 1, 2010 | Descriptive statistics
An empirical relationship exists between mean, median and mode. For a moderately skewed distribution it is: If a frequency distribution has a symmetrical frequency curve, the mean, median and mode are equal. If a frequency distribution is... by kasi | Jun 1, 2010 | Descriptive statistics
The value which has a higher frequency than others in its neighborhood is called mode. The important characteristic of mode is that, it is easy to compute and may be applied to qualitative as well as quantitative data. It is generally used when the data is of... by kasi | Jun 1, 2010 | Descriptive statistics
When the observations are arranged in ascending or descending order, the value which divides them into two parts is called median. Therefore median is that value below and above which 50% of observations lie. The median is not influenced by extreme values in the data... by kasi | May 31, 2010 | Descriptive statistics
There is a Mathematical relationship between arithmetic mean, geometric mean, and harmonic mean. This relationship is given as: This relationship can be proved with the help of following problem. Problem: Following are the number of students enrolled in...