Find the mean employee age from the table below- Use assumed mean method-Wline Age in years - Number of omployeesll Wline 20-25 - 20 1Wline25-30 - 15 Wline30-35 - 1211Wline 35-40 - 10 1Wline40-45 - 10 1Wline45-50 - 811Wlineend array A- 29-67B- 30-75C- 32-43D- 36-83

The correct option is C 32.43 [ Class amp; X amp; F amp; D amp; FD; amp; amp; amp; (X A) ...

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Standard XI

Statistics

Mean of Continuous Series

Find the mean...

Question

Find the mean employee age from the table below. Use assumed mean method.

$\begin{matrix} A g e (i n y e a r s) & N u m b e r o f e m p l o y e e s 20 - 25 & 20 25 - 30 & 15 30 - 35 & 12 35 - 40 & 10 40 - 45 & 10 45 - 50 & 8 \end{matrix}$

29. 67

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30.75

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32.43

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36.83

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Solution

The correct option is C
32.43

$\begin{matrix} C l a s s & X & F & D & F D (X - A) 20 - 25 & 22.5 & 20 & - 10 & - 200 25 - 30 & 27.5 & 15 & - 5 & - 75 30 - 35 & 32.5 (= A) & 12 & 0 & 0 35 - 40 & 37.5 & 10 & 5 & 50 40 - 45 & 42.5 & 10 & 10 & 100 45 - 50 & 47.5 & 8 & 15 & 120 \sum F = 75 & - 5 \end{matrix}$

$M e a n a g e = A + \frac{\sum F D}{\sum F} = 32.5 + \frac{- 5}{75} = 32.43 y e a r s$

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Find the mean employee age from the table below. Use assumed mean method. Age (in years)Number of employees20−252025−301530−351235−401040−451045−508

The correct option is C 32.43 ClassXFDFD(X−A)20−2522.520−10−20025−3027.515−5−7530−3532.5(=A)120035−4037.51055040−4542.5101010045−5047.5815120∑F=75−5 Mean age=A+∑FD∑F=32.5+−575=32.43 years

Find the mean employee age from the table below. Use assumed mean method.

$\begin{matrix} A g e (i n y e a r s) & N u m b e r o f e m p l o y e e s 20 - 25 & 20 25 - 30 & 15 30 - 35 & 12 35 - 40 & 10 40 - 45 & 10 45 - 50 & 8 \end{matrix}$