Question

1) Assume that a firm has selected a random sample of 100 employees from its production line
representing their monthly working hours and obtain the data shown in the table below:
Class Interval
130-135 135-140 140-145 145-150 150-155
155-160
160-165
Frequency
3
12
21
18
19
12
3
Calculate the following from the above data and also interpret the results.
(10)
i) The arithmetic Mean
ii) The standard deviation
iii) Coefficient of skewness
iy) Coefficient of kurtosis​

Answer 1

Step-by-step explanation:

Mode is defined as the value of a variable which occurs most frequently. It is the value of the variable that corresponds to the maximum frequency of the distribution. In any series, it is the value of the item which is most characteristic or common and is usually repeated the maximum number of times. Mode can easily be computed by merely looking at the data. All that one has to do is to find out the item which is repeated the maximum number of times.