Question
For the variables X and Y, we collect 4 observations
with ∑ X = 10,∑ Y = 14,∑ X2 = 30,∑ Y2 = 54,∑ XY = 31 The regression line y on x isSolution
The correct answer is D
In a rectangular floor of length and breadth of 21 metres and 4 metres, respectively, square tiles each of 2 metre edge length are to be laid. If the co...
Find the number of sides in a polygon in which each internal angle is 120° ?
What is the difference between (in m2) the area of a circular field of radius 14 metres and area of a rectangular piece of land having its di...
Each side of square ‘A’ is 5 cm less than that of square ‘B’. The perimeter of a rectangle is 2 times the difference of the perimeters of the tw...
The curved surface area of the sphere is 154 cm2 . Find the volume of the sphere (rounded off to one digit after decimal).
The area of a regular hexagon with side as 6 cm is
Height of a cylindrical vessel is equal to side of a square, whose area is 324cm². Radius of cylindrical vessel is equal to average of radius of a sphe...
The area of a rhombus is 170 cm2. The length of one of its diagonals is 20 cm. The length of the other diagonal is:
The curved surface area of a cone exceeds that of a cylinder by __ cm². The radius of the cone is twice that of the cylinder. The area of the cylinder...
The cost of fencing a rectangular field at the rate of Rs. 5/metre is Rs. 450. If the length of the field is 11 metres more than its breadth, then find ...
