The following values are calculated in respect  of heights and weights of the students of a section of class XI:   Height Weight Mean 162.6 cm 52.36 kg Variance 127.69cm2 23.1361 kg2 Can we say that the weights show greater variation than the heights?

The means and standard deviations of heights ans weights of 50 students of a class are as follows: Weights Heights Mean 63.2 kg 63.2 inch Standard deviation 5.6 kg 11.5 inch Which shows more variability, heights or weights?

The means and standard deviations of heights ans weights of 50 students of a class are as follows: Weights Heights Mean 63.2 kg 63.2 inch Standard deviation 5.6 kg 11.5 inch Which shows more variability, heights or weights?

Following table shows the weights of 12 students: Weight (in kgs): 67 70 72 73 75 No. of Students: 4 3 2 2 1 Find the mean weight.

Following table shows the weights of 12 students: Weight (in kgs): 67 70 72 73 75 No. of Students: 4 3 2 2 1 Find the mean weight.

Following table shows the weight of 12 students: Weight (in kgs) 67 70 72 73 75 Number of Students: 4 3 2 2 1 Find the mean weight of the students.

The following table shows the weights (in kg) of 15 workers in a factory: Weight (in kg): 60 63 66 72 75 Numbers of workers: 4 5 3 1 2 Calculate the mean weight.

A 6 kg weight is fastened to the end of a steel wire of un stretched length 60 cm . It is whirled in a vertical circle and has an angular velocity of 2 rev//s at the bottom of the circle. The area of cross - section of the wire is 0.05 cm ^(2) . Calculate the elongation of the wire when the weight is at the lowest point of the path . Young's modulus of steel = 2xx10 ^(11) N //m^(2) .

Following frequency distribution given the weights of 38 students of a class: Weight in Kg: 31-35 36-40, 41-45, 46-50, 51-55, 56-60 61-65, 66-70 71-75 No. of students 9 5 14 3 1 2 2 1 1 Find the probability that weight of a student in the class is: (i)at most 60 kg (ii)at least 36 kg (iii)not more than 50kg. Also define two events in this context, one having probability 0 and the other having probability 1.

One end of a 60m long rope of mass 1.8 kg is tied to a rigid horizontal support held high above the ground. The rope hangs vertically and kept taut by a weight 'W' suspended at its lower end. A person jerks the lower end of the rope sideways in a sinusoidal manner and a transverse wave of frequency 2 Hz and amplitude 10cm passes along the rope such that there are 2 cycles of the wave in the total length of the rope. Neglecting the weight of the rope as compared to the suspended weight W and with g = 10m/s2, answer the following questions. (S = 75 xx 10^(-4) m^2) In the questions above, weight of the rope has been neglected as compared to the suspended weight. However, if we also account for the weight of the rope. the speed of the wave at the top of the rope will be

Hanumappa and his wife Gangavva are busy making Jaggery out of sugar-cane. They have processed the sugarcane juice to make the molasses which is poured into moulds of the shape shown in Figure. It will be cooled to solidify in this shape to be sent to the market. Each mould is in the shape of a frustum of a cone having the diameters of its two circular ends as 30 cm and 35 cm and the height of the mould is 14 cm. If each c m^3 of molasses weighs about 1.2 gm, find the weight of molasses that can be poured into each mould (Take pi=22//7 )