Find $¯ x$ using Assumed mean method.

7.933

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6.933

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5.933

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4.933

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Solution

The correct option is D $4.933$
Answer:- By shortcut Method

X F d=X-A Fd
12 10 8 80
6 20 2 40
8 30 4 120
4=A 40 0 0
2 50 -2 -100
$Σ f = 150$ $Σ f d = 140$
Mean = $A + \frac{Σ f d}{Σ f} = 4 + \frac{140}{150} = 4 + 0.93 = 4.93$
D)4.93

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X	F	d=X-A	Fd
12	10	8	80
6	20	2	40
8	30	4	120
4=A	40	0	0
2	50	-2	-100
	$Σ f = 150$		$Σ f d = 140$

Find ¯x using Assumed mean method.

The correct option is D 4.933Answer:- By shortcut MethodXFd=X-A Fd 121088062024083041204=A4000250-2-100 Σf=150 Σfd=140 Mean = A+ΣfdΣf=4+140150=4+0.93=4.93D)4.93

Find $¯ x$ using Assumed mean method.

The correct option is D $4.933$
Answer:- By shortcut Method

X F d=X-A Fd
12 10 8 80
6 20 2 40
8 30 4 120
4=A 40 0 0
2 50 -2 -100
$Σ f = 150$ $Σ f d = 140$
Mean = $A + \frac{Σ f d}{Σ f} = 4 + \frac{140}{150} = 4 + 0.93 = 4.93$
D)4.93