Question

two candidates X and Y obtain the following scores in 10 papers in an examination which of the candidate short more consistent performance?find coefficient of variation?
x 58 48 77 82 50 72 61 60 77 48 y 42 47 87 70 75 70 57 50 83 66​

Answer 1

Answer:

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Step-by-step explanation:

(A) Main Concepts and Results

Statistics

Meaning of ‘statistics’, Primary and secondary data, Raw/ungrouped data, Range of

data, Grouped data-class intervals, Class marks, Presentation of data - frequency

distribution table, Discrete frequency distribution and continuous frequency distribution.

• Graphical representation of data :

(i) Bar graphs

(ii) Histograms of uniform width and of varying widths

(iii) Frequency polygons

• Measures of Central tendency

(a) Mean

(i) Mean of raw data

Mean = 1 2 1 ...

n

i

n i

x

xx x

x

n n

+ ++ = = =



where x1

, x2

, ..., xn

are n OBSERVATIONS