ASSIGNMENT No. 1

ASSIGNMENT No. 1

Q) 1 Marks obtain by 50 students of a class are given below

a)  23, 50, 38, 42, 63, 75, 12, 33, 26, 39, 35, 47, 43, 52, 56, 59, 64, 77, 15, 21, 51, 54, 72, 68, 36, 65, 52, 60, 52, 60,27, 34, 47, 48, 55, 58, 59, 62, 51, 41, 57, 65, 54, 43,56,44,30,46,67,53.

Construct a frequency distribution with a suitable class interval size.

b) Differentiate between primary and secondary data.

Q) 2 Find the median, Q3,D7,P87 and Coefficient of Variation.

Class	f
2----2.9	5
3----3.9	6
4----4.9	4
5----5.9	2
6----6.9	3

Q) 3  The following data pertain to the demand for a product in thousands of units and price charged I in rupees in eight different locations.                                                                                                         

                                                                               

PRICE	DEMAND
14	150
12	180
15	112
13	140
18	86
15	124
9	223

         a)      Determine the equation of the least squares regression line.

         b)      Determine the coefficient of correlation.

         c)      Interpret your results.

         d)      Predict the demand if the price is Rs.10.