Question

x

8.4

6.6

3

1.1

11.9

Find the mean:

Find the median:

Find the sample standard deviation

Answer 1

Solution:

Given that,

8.4,6.6,3,1.1,11.9

a )The mean of sample is   

x/n =  (8.4+ 6.6 + 3 + 1.1 + 11.9 / 5)

= 6.2

The sample mean is 6.2

(c) median= the median is the middle most observation of the data set

Sample standard deviation is s

s = 1/(n-1)(x - )²

⁼  1/4 (8.4 - 6.2 )²+ (6.6 - 6.2 )²+ (3- 6.2 )²+ (1.1- 6.2 )² +( 11.9 - 6.2 )²

= 18.435

= 4.2935

The sample standard deviation is  4.2935