Three samples of five, five and five motor car tyres are drawn respectively from three brands A, B and C manufactured by

[answerhappygod]

Three samples of five, five and five motor car tyres are drawn
respectively from three brands A, B and C manufactured by three
machines. The life - time of these tyres (in 1000 miles) is given
below. Test whether the average life– time of the three brands of
tyres are equal or not.
A
B
C
10
9
14
12
7
11
9
12
15
16
11
14
13
11
16