[b][size=150][color=#0000ff]1. Mean[/color][/size][/b][br][b]For individual series [br][/b][b][math]\text{Mean}(\overline{x})=\frac{\Sigma x}{N}[/math][b][br]For discrete series [br][/b][math] \text{Mean} (\overline{x}) =\frac{\Sigma fx }{N} [/math][br][size=150][color=#0000ff]2. Median.[/color][/size][br][b]For Individual or discrete series[br][/b][math]\text{Median}(m_d)=\left(\frac{N+1}{2}\right)^{th}\text{ item}[/math][br][color=#0000ff]3. Lower quartile or First quartile ([/color][/b][math]Q_1[/math][b][color=#0000ff] )[/color][/b][br][b]For Individual and discrete series[br][/b][math] Q_1 = \left(\frac{N+1}{4}\right)^{th} \text{ item} [/math][br][color=#0000ff][b]4. Upper quartile or Third quartile([/b][/color][math] Q_3 [/math][color=#0000ff][b] )[/b][/color][br][b]For Individual and discrete series[br][math]Q_3=3\left(\frac{N+1}{4}\right)^{th}\text{ item}[/math][br][/b]

Dear learner,[br][list][*] Click [color=#00ff00][b]Green coloured[/b] [/color]buttons for table.[/*][*]Click[color=#00ff00] [/color][color=#00ffff][b]Cyan[/b] [/color][color=#333333]coloured buttons for solution steps.[/color][br][/*][*]To change data, click on [size=150][b] check box [/b]named[b] [/b][/size] [color=#ff0000]Ambik[/color] .[/*][*]Again click [b]check box[/b] .[/*][*]Again click [color=#00ff00][b]Green coloured[/b] [/color]buttons for table.[/*][*]Again click [color=#00ffff][b]Cyan[/b][/color] coloured buttons for solution steps.[/*][*]We can use this applet to check our answer steps and to teach our students.[/*][/list]