Question

The heights of nba players were recorded in inches : 81 77 83 83 77 81 72 76 What is the mean, median, and mode?

Answer 1

81 77 83 83 77 81 72 76

Xi	increasing
81	72
77	76
83	77
83	77
77	81
81	81
72	83
76	83
total	630

n=8

Mean=(sum of all observations)/n

=630/8 = 78.75 iches

To calculate median first arrange all data in increasing or decreasing order.

Median= the [(n+1)/2]^thitem

= the[9/2]^th item = the (4.5)th item

= (4)^th item+0.5[(5)th - (4)th item]

=77+0.5[81-77]

Median=79 inches

Mode=value which repeates maximum number of times is called mode

in this case there are three modes

77,81,83

This case is called TRI-MODAL.