Find the mean (correct to one place of decimal) by using short-cut method. x | f ----- | ------ 40 | 14 41 | 28 43 | 38 45 | 50 46 | 40 49 | 20 50 | 10

Let the assumed mean (A) be 45 x | f | d = x - A | fd ----- | ------ | ------ | ---------- 40 | 14 | 40 - 45 = -5 | -70 41 | 28 | 41 - 45 = -4 | -112 43 | 38 | 43 - 45 = -2 | -76 A = 45 | 50 | 45 - 45 = 0 | 0 46 | 40 | 46 - 45 = 1 | 40 49 | 20 | 49 - 45 = 4 | 80 50 | 10 | 50 - 45 = 5 | 50 Total | Σf = 200 | | Σfd = -88 By formula, Mean = A + = 45 - 0.44 = 44.56 ≈ 44.6 Hence, mean = 44.6

x	f
40	14
41	28
43	38
45	50
46	40
49	20
50	10

In the following table, Σf = 200 and mean = 73. Find the missing frequencies f₁ and f₂.
x f
0 46
50 f₁
100 f₂
150 25
200 10
250 5

x	f
0	46
50	f₁
100	f₂
150	25
200	10
250	5

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Find the arithmetic mean (correct to nearest whole number) by using step deviation method.
x f
5 20
10 43
15 75
20 67
25 72
30 45
35 39
40 9
45 8
50 6

x	f
5	20
10	43
15	75
20	67
25	72
30	45
35	39
40	9
45	8
50	6

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The mean of given observations is :
C.I. f
30-40 2
40-50 3
41
27
71
91

C.I.	f
30-40	2
40-50	3

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For data given in the adjoining table, the mean is :
C.I. f x u = (x - A)/i f × u
0-10 5
10-20 10
20-30 10
17
27
25
60

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Mathematics

Find the mean (correct to one place of decimal) by using short-cut method.
x f
40 14
41 28
43 38
45 50
46 40
49 20
50 10

Measures of Central Tendency

Related Questions

In the following table, Σf = 200 and mean = 73. Find the missing frequencies f₁ and f₂.
x f
0 46
50 f₁
100 f₂
150 25
200 10
250 5

Find the arithmetic mean (correct to nearest whole number) by using step deviation method.
x f
5 20
10 43
15 75
20 67
25 72
30 45
35 39
40 9
45 8
50 6

The mean of given observations is :
C.I. f
30-40 2
40-50 3
41
27
71
91

For data given in the adjoining table, the mean is :
C.I. f x u = (x - A)/i f × u
0-10 5
10-20 10
20-30 10
17
27
25
60

Mathematics

Find the mean (correct to one place of decimal) by using short-cut method.xf4014412843384550464049205010

Measures of Central Tendency

Related Questions

In the following table, Σf = 200 and mean = 73. Find the missing frequencies f1 and f2.xf04650f1100f215025200102505

Find the arithmetic mean (correct to nearest whole number) by using step deviation method.xf520104315752067257230453539409458506

The mean of given observations is :C.I.f30-40240-50341277191

For data given in the adjoining table, the mean is :C.I.fxu = (x - A)/if × u0-10510-201020-301017272560

Find the mean (correct to one place of decimal) by using short-cut method.
x f
40 14
41 28
43 38
45 50
46 40
49 20
50 10

In the following table, Σf = 200 and mean = 73. Find the missing frequencies f₁ and f₂.
x f
0 46
50 f₁
100 f₂
150 25
200 10
250 5

Find the arithmetic mean (correct to nearest whole number) by using step deviation method.
x f
5 20
10 43
15 75
20 67
25 72
30 45
35 39
40 9
45 8
50 6

The mean of given observations is :
C.I. f
30-40 2
40-50 3
41
27
71
91

For data given in the adjoining table, the mean is :
C.I. f x u = (x - A)/i f × u
0-10 5
10-20 10
20-30 10
17
27
25
60