Answer
$lower~critical~value\lt r\lt upper~critical~value$: null hypothesis is not rejected.
There is not enough evidence to conclude that coach’s play selection is not random.
Work Step by Step
$H_0:~The~sequence~is~random$ versus $H_1:~The~sequence~is~not~random$
$n=15$, $n_r=9$, $n_p=6$ and $r=9$
Small sample case:
$lower~critical~value=4$
$upper~critical~value=13$
(According to table X, for $n_1=9$, $n_2=6$)
Test statistic: $r=9$
Since $lower~critical~value\lt r\lt upper~critical~value$, we do not reject the null hypothesis.
