Find the mean age in years from the frequency distribution given below- begin array - c - c - WlineClass interval of - Frequency 11 age in years - fi 1 Wline 25-29 - 4 hline 30-35 - 14 Wline35-39 - 2211Wline40-45 - 16 1Wline45-49 - 6 Wline 50-55 - 5 lWline 55-59 - 3 1hline Total - 70 1Wline endarray A- 39-39B- 39-35C- 40-15D- 40-39

The correct option is B 39.35[ Class amp; f_i amp; x_i amp; f_i x_i; interval amp; amp; amp; ...

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Byju's Answer

Standard XI

Statistics

Mean of Continuous Series

Find the mean...

Question

Find the mean age in years from the frequency distribution given below:
$\begin{matrix} C l a s s i n t e r v a l o f & F r e q u e n c y a g e i n y e a r s & (f_{i}) 25 - 29 & 4 30 - 35 & 14 35 - 39 & 22 40 - 45 & 16 45 - 49 & 6 50 - 55 & 5 55 - 59 & 3 T o t a l & 70 \end{matrix}$

39.35

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39.39

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40.15

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40.39

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Solution

The correct option is A 39.35
$\begin{matrix} C l a s s & f_{i} & x_{i} & f_{i} x_{i} i n t e r v a l 25 - 29 & 4 & 27 & 108 30 - 35 & 14 & 32 & 448 35 - 39 & 22 & 37 & 814 40 - 45 & 16 & 42 & 672 45 - 49 & 6 & 47 & 282 50 - 55 & 5 & 52 & 260 55 - 59 & 3 & 57 & 171 T o t a l & \sum f_{i} = 70 & 2755 \end{matrix} M e a n = \frac{\sum f_{i} x_{i}}{\sum f_{i}} = \frac{2755}{70} = 39.4$

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Similar questions

Find the mean age from the following frequency distribution:
$\begin{matrix} Age (in years) & 25 - 29 & 30 - 34 & 35 - 39 & 40 - 44 & 45 - 49 & 50 - 54 & 55 - 59 Number of persons & 4 & 14 & 22 & 16 & 6 & 5 & 3 \end{matrix}$

Find the mean age in years from the frequency distribution given below:
$\begin{matrix} Class interval of age in years & Frequency (f_{i}) 25 - 29 & 4 30 - 34 & 14 35 - 39 & 22 40 - 44 & 16 45 - 49 & 6 50 - 54 & 5 55 - 59 & 3 Total & 70 \end{matrix}$

Q. Find the mean age from the following frequency distribution:

Age (in years)	25-29	30-34	35-39	40-44	45-49	50-54	55-59
No. of person	4	14	22	16	6	5	3

Q. Find the mean age in years from the frequency distribution given below.

\begin{matrix} C l a s s i n t e r v a l o f a g e i n y e a r s & F r e q u e n c y (f_{i}) 25 - 29 & 4 30 - 34 & 14 35 - 39 & 22 40 - 44 & 16 45 - 49 & 6 50 - 54 & 5 55 - 59 & 3 T o t a l & 70 \end{matrix}

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Find the mean age in years from the frequency distribution given below: Class interval ofFrequencyage in years(fi)25−29430−351435−392240−451645−49650−55555−593Total70

The correct option is A 39.35Classfixifixiinterval25−2942710830−35143244835−39223781440−45164267245−4964728250−5555226055−59357171Total∑fi=702755Mean=∑fixi∑fi=275570=39.4

Find the mean age in years from the frequency distribution given below:
$\begin{matrix} C l a s s i n t e r v a l o f & F r e q u e n c y a g e i n y e a r s & (f_{i}) 25 - 29 & 4 30 - 35 & 14 35 - 39 & 22 40 - 45 & 16 45 - 49 & 6 50 - 55 & 5 55 - 59 & 3 T o t a l & 70 \end{matrix}$