Question

(b) Using the above equation, estimate sales for a space allotment of 7 square feet.





Question # 3 (5)

The price earnings ratio for 12 computer companies are recorded below:

26.5, 18.8, 8.6, 12.6, 29.4, 23.6, 35.5, 19.0, 38.6, 14.3, 20.1, 10.7.

Calculate

(a) Mean.

(b) Variance.

(c) Standard Deviation.

(d) Coefficient of Variation​

Answer 1

Answer:

i think option (a) is correct

Answer 2

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(a)Mean:- 21.47

(b)Variance:‐ 92

(c)Standard Deviation:-9.6

(d)Coefficient of Variation:- 44.6%

${\large{\textsf{\textbf{Extra Information:-}}}}$

MEAN:

The mean is the average or the most common value in a collection of numbers. In statistics, it is a measure of central tendency of a probability distribution along median and mode.

VARIANCE:

The arithmetic mean of squared deviations of the values taken from arithmetic mean is called variance.

STANDARD DEVIATION:

The positive square root of variance is called standard deviation.

COEFFICIENT OF VARIATION:

The coefficient of variation (CV) is the ratio of the standard deviation to the mean. The higher the coefficient of variation, the greater the level of dispersion around the mean. It is generally expressed as a percentage. ... The lower the value of the coefficient of variation, the more precise the estimate.

Thankyou!!