Using assumed mean method, calculate the mean. Class-interval | Frequency ----- | ------- 0-30 | 22 30-60 | 30 60-90 | 40 90-120 | 36 120-150 | 28 150-180 | 20

Class-interval | Frequency (f) | Class mark (x) | d = x - A | fd ----- | ------- | -------- | ------ | ------- 0-30 | 22 | 15 | -60 | -1320 30-60 | 30 | 45 | -30 | -900 60-90 | 40 | A = 75 | 0 | 0 90-120 | 36 | 105 | 30 | 1080 120-150 | 28 | 135 | 60 | 1680 150-180 | 20 | 165 | 90 | 1800 Total | Σf = 176 | | | Σfd = 2340 By formula, Mean = A + = 75 + = 75 + 13.30 = 88.30 Hence, mean = 88.30

Class-interval	Frequency
0-30	22
30-60	30
60-90	40
90-120	36
120-150	28
150-180	20

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In the given figure, O is the center of the circumcircle of triangle XYZ. Tangents at points X and Y intersect at point T. If angle XTY = 80° and angle XOZ = 140°, find the angle ZXY.

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Mathematics

Using assumed mean method, calculate the mean.
Class-interval Frequency
0-30 22
30-60 30
60-90 40
90-120 36
120-150 28
150-180 20

Statistics

Related Questions

In the given figure, O is the center of the circumcircle of triangle XYZ. Tangents at points X and Y intersect at point T. If angle XTY = 80° and angle XOZ = 140°, find the angle ZXY.

Mathematics

Using assumed mean method, calculate the mean.Class-intervalFrequency0-302230-603060-904090-12036120-15028150-18020

Statistics

Related Questions

In the given figure, O is the center of the circumcircle of triangle XYZ. Tangents at points X and Y intersect at point T. If angle XTY = 80° and angle XOZ = 140°, find the angle ZXY.

Using assumed mean method, calculate the mean.
Class-interval Frequency
0-30 22
30-60 30
60-90 40
90-120 36
120-150 28
150-180 20