Calculate the mean of the following data-array - c - c - WlineClass - Frequencyl- Wline0-10 - 411Wline 10-20 - 1111Wline 20-30 - 15 1Wline30-40 - 20 1Wline40-50 - 9 lWline 50-60 - 5 1Wline array A- 28-5B- 34-5C- 30-3D- 32-4

The correct option is C 30.3[ Class amp; X amp; F amp;FX; 0 10 amp; 5 amp; 4 amp; 20; ...

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Byju's Answer

Standard XI

Statistics

Mean Deviation from Mean for Continuous Series

Calculate the...

Question

Calculate the mean of the following data.

$\begin{matrix} C l a s s & F r e q u e n c y 0 - 10 & 4 10 - 20 & 11 20 - 30 & 15 30 - 40 & 20 40 - 50 & 9 50 - 60 & 5 \end{matrix}$

28.5

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30.3

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32.4

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34.5

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Solution

The correct option is B 30.3
$\begin{matrix} C l a s s & X & F & F X 0 - 10 & 5 & 4 & 20 10 - 20 & 15 & 11 & 165 20 - 30 & 25 & 15 & 375 30 - 40 & 35 & 20 & 700 40 - 50 & 45 & 9 & 405 50 - 60 & 55 & 5 & 275 \sum F = 64 & \sum F X = 1940 \end{matrix}$

$M e a n = \frac{\sum F X}{\sum F} = \frac{1940}{64} = 30.3$

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Calculate the mean of the following data. ClassFrequency0−10410−201120−301530−402040−50950−605

The correct option is B 30.3ClassXFFX0−10542010−20151116520−30251537530−40352070040−5045940550−60555275∑F=64∑FX=1940 Mean=∑FX∑F=194064=30.3

Calculate the mean of the following data.

$\begin{matrix} C l a s s & F r e q u e n c y 0 - 10 & 4 10 - 20 & 11 20 - 30 & 15 30 - 40 & 20 40 - 50 & 9 50 - 60 & 5 \end{matrix}$