Compute the mean of the following data- using direct method- - Class 0-100 100-200 200-300 300-400 400-500- Frequency 6 10 8 12 4- -

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Direct Method of Finding Mean

Compute the m...

Question

Compute the mean of the following data, using direct method:
$\begin{matrix} Class & 0 - 100 & 100 - 200 & 200 - 300 & 300 - 400 & 400 - 500 Frequency & 6 & 10 & 8 & 12 & 4 \end{matrix}$

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Solution

class interval Fi class mark(Xi) XiFi

0-100 6 50 300

100-200 10 150 1500

200-300 8 250 2000

300-400 12 350 4200

400-500 4 450 1800

40 9800

From above
we can say

$stack sum f i X i equals 9800 with blank below a n d space m e a n space left parenthesis x right parenthesis equals fraction numerator begin display style stack sum f i X i with blank below end style over denominator begin display style stack sum X i with blank below end style end fraction equals 9800 over 40 equals 245$

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class interval	Fi	class mark(Xi)	XiFi
0-100	6	50	300
100-200	10	150	1500
200-300	8	250	2000
300-400	12	350	4200
400-500	4	450	1800
	40		9800

Compute the mean of the following data, using direct method: Class0−100100−200200−300300−400400−500Frequency6108124

class interval Fi class mark(Xi) XiFi 0-100 6 50 300 100-200 10 150 1500 200-300 8 250 2000 300-400 12 350 4200 400-500 4 450 1800 40 9800 From above we can say

Compute the mean of the following data, using direct method:
$\begin{matrix} Class & 0 - 100 & 100 - 200 & 200 - 300 & 300 - 400 & 400 - 500 Frequency & 6 & 10 & 8 & 12 & 4 \end{matrix}$