Here is some information about 30 trains leaving a station.
a) Work out an estimate of the me
number of minutes late.
Number of Number
minutes late, t of trains
Midpoint
Ost<5
9
5 st< 10
10 st < 15
t2 15
14
b) The station manager looked a
information in more detail, usi
7
smaller class intervals to estir
0
the mean.
How would this affect his esti
A Less accurate
These boxes can be used to help with
your answer but won't gain any marks. B. More accurate