[填空题]
The number of phone ep* -d*qul3qdpo7mt(t ;vhj;xa 8p*/3)oj onigm8:pzc/a mrcalls per hour that store managers receive during the day are show8zrjoa:;p cpn ha8/i*m)gtmxvj3 / o;n 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.
