[填空题]
The number of phone ;)d u4rmxb ld+;mqh* ucaaa75j:x 7jk 0n5 qfhdkj3ar9ylls per hour that store managers receive during the day are shoj 0ara55hk f ja73nqd:jx7y9kwn below.
$\begin{array}{llllllll}3 & 5 & 6 & 2 & 4 & 7 & 4 & 9\end{array} $
1. Find the median number of calls.
2. Write down the value of
(1). the mode;
(2). the upper quartile.
3. Find the probability that managers received no more than 5 calls in a randomly chosen hour.
