Question

A purchasing agent obtained samples of incandescent lamps from a supplier. He had the samples tested in his own laboratory for length of life with the following results:


length of life (in hours) 700-900,900-1100 , 1100-1300 , 1300-1500
Samples: 10,16, 26 ,8

Find the standard deviation and coefficient of standard deviation. ​

Answer 1

Answer:

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Area of a Sector of Circle = (θ/360º) × πr2, where, θ is the angle subtended at the center, in degrees, and r is the radius of the circle. Area of a Sector of Circle = 1/2 × r2θ, where, θ is the angle subtended at the center, in radians, and r is the radius of the circle.

Answer 2

Step-by-step explanation:

first we find mean

then standard deviation

then c.v