Economy, asked by kameshwarsaw9, 2 months ago

1. Calculate Mean, Median, Mode, Quartile 1, Quartile 3
Marks - 10, 20, 30, 40, 50, 60, 70. ​

Answers

Answered by MaheswariS
0

\textbf{Given:}

\textsf{Data:}

\mathsf{10,20,30,40,50,60,70}

\textbf{To find:}

\textsf{Mean, Median, Mode, Quartile1, Quartile3}

\textbf{Solution:}

\underline{\textsf{Mean:}}

\mathsf{Mean=\dfrac{Sum\;of\;observations}{Number\;of\;observations}}

\mathsf{Mean=\dfrac{10+20+30+40+50+60+70}{7}}

\mathsf{Mean=\dfrac{10(1+2+3+4+5+6+7)}{7}}

\mathsf{Mean=\dfrac{10\left(\dfrac{7{\times}8}{2}\right)}{7}}

\mathsf{Mean=10{\times}4}

\implies\boxed{\mathsf{Mean=40}}

\underline{\mathsf{Median:}}

\textsf{Arrange the given numbers in ascending order}

\mathsf{10,20,30,\boxed{40},50,60,70}

\implies\boxed{\mathsf{Median=40}}

\underline{\mathsf{Mode:}}

\mathsf{Mode=3(Median)-2(Mean)}

\mathsf{Mode=3(40)-2(40)}

\mathsf{Mode=120-80}

\implies\boxed{\mathsf{Mode=40}}

\underline{\mathsf{Q_1:}}

\mathsf{=Median\;of\;the\;lower\;half\;of \;the\;set\{10,20,30,40\}}

\mathsf{=\dfrac{20+30}{2}}

\mathsf{=\dfrac{50}{2}}

\implies\boxed{\mathsf{Q_1=25}}

\underline{\mathsf{Q_3:}}

\mathsf{=Median\;of\;the\;upper\;half\;of \;the\;set\{40,50,60,70\}}

\mathsf{=\dfrac{50+60}{2}}

\mathsf{=\dfrac{110}{2}}

\implies\boxed{\mathsf{Q_3=55}}

\textbf{Find more:}

calculate coefficient of quartile deviation from the following data. 10,17,10,31,32,39,41,44,45,42​

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