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Find the actual lower and upper class limits and also the class marks of the classes : 1.1 - 2.0, 2.1 - 3.0 and 3.1 - 4.0.

Calculate the variance and standard deviation of the observations : 11, 12, 13, . . . .. 20.

The ages of 15 students in years) in a summer camp are as follows: 11, 14, 13, 15, 16, 10, 12, 12, 14, 11, 10, 12, 13, 15, 11 Find: the range of age.

The ages of 15 students (in years) in a summer camp are as follows: 11, 14, 13, 15, 16, 10, 12, 12, 14, 11, 10, 12, 13, 15, 11 Find: the maximum age.

The ages of 15 students (in years) in a summer camp are as follows: 11, 14, 13, 15, 16, 10, 12, 12, 14, 11, 10, 12, 13, 15, 11 Find: the minimum age.

The ages of 15 students in years) in a summer camp are as follows: 11, 14, 13, 15, 16, 10, 12, 12, 14, 11, 10, 12, 13, 15, 11 Find: The mean age.

Law of Parallelogram | Vector | Class XI Physics | IIT JEE | NEET

Venturi Meter | Mechanical Properties of Fluids | Class XI Physics | IIT JEE | NEET | CBSE

While calculating mode the following observation are found. Lower limit of modal class =40, frequency of modal class =20, frequency of previous class =12 , frequency of preceding class =11 and width of the class =10, find mode .

In a frequency distribution, the mid-value of a class is 15 and the class intervals is 4. The lower limit of the class is 10 (b) 12 (c) 13 (d) 14