Problem:
A bank manager recorded the amount of time each customer spent waiting in line during peak business hours one Monday. The frequency table below summarizes the results. Find the standard deviation and round to one decimal place.
Waiting time Number of
(minutes) customers
0 – 3 8
4 – 7 13
8 – 11 12
12 – 15 14
16 – 19 0
20 – 23 3
a) 5.5 b) 5.3 c) 5.0 d) 5.4
Not sure how to construct a stem-and-leaf display for the given data table??
56 72 48 42 68
37 32 49 63 81
38 32 48 66 87
44 79 58 54 51