A survey was carried out, similar to the one described in Topic 50 notes, to investigate the amount of time that a group of students watched TV. 15 students at each form level of a secondary school were asked the question:
"Approximately how many hours of TV, (to nearest half hour) do you watch, on average, each weekday"
The results are given below (hours of TV watched):
(a) Calculate the average (mean) time spent watching TV by students at each level on weekdays. Show this information on a bar graph.
(b) Arrange each set of data in order and calculate the medians and quartiles. Draw a box and whisker diagram to illustrate these statistics.
(c) Use these graphs and diagrams to make comments on this data.