All 30 members of a 'Nature Club' in a school planted trees in the foundation day. The number of saplings planted by each member is given below. Prepare an ungrouped frequency distribution table:5, 4, 4, 6, 7, 4, 3, 5, 6, 4, 3, 7, 5, 4, 3, 2, 7, 6, 5, 3, 8,3, 2, 4, 5, 6, 5, 4, 4, 5

In a 'tree plantation' project of a certain school there are 45 students of 'Harit Sena'.The record of trees planted by each student is given below:3, 5, 7, 6, 4, 3, 5, 4, 3, 5, 4, 7, 5, 3, 6, 6, 5, 3, 4, 5, 7,3, 5, 6, 4, 4, 3, 5, 6, 6, 4, 3, 5, 7, 3, 4, 5, 7, 6, 4, 3, 5, 4,4,7 Prepare frequency distribution table of the data.

What is the mean of 1, 2, 3, 4, 5, 6, 7 ?

The number of peas, in 30 pea pods, was observed as given below : 3,5, 4, 2, 1, 5, 2, 2, 4, 4, 3, ,3 4, 5, 6, 5, 4, 4, 2, 1, 1, 4, 5, 4, 5, 6, 4, 4, 4, 1 Prepare a frequency distribution table of the data.

Find the variance and S.D. for the following set of numbers. : 7, 11, 2, 4, 9, 6, 3, 7, 11, 2, 5, 8, 3, 6, 8, 8, 2, 6