# Mean from a bar chart

advertisement
```Mean, median and mode
from a Bar Chart(3)
Statistics
In a survey pupils were
asked to count the
number of books
they carried to
school in their bags.
The results are
shown in
the bar chart
Use the
bar chart to
calculate the
mean, median
and mode.
3
4
5
6
7
Number of books
8
9
A survey was carried
out to see how many
pupils were using
the school bus.
The number on the
bus each day was
recorded
and the results
are shown
in the bar chart.
8
9
10
11
12
13
Number of pupils on the bus each day
14
Use the
bar chart to
calculate the
mean, median
and mode.
A company produce
boxes of matches.
They claim that on
average there are
more than 62 matches
in a box.
To check their
claim a number of
boxes were opened and
the matches counted.
The results are shown
in the bar chart
Use the
bar chart to
calculate the
mean. Is the claim
Justified?
60
61
62
63
64
Number of matches in a box
65
66
A record was kept
of the number of
pupils absent from
class over a period
of time.
The results are
shown in the
bar chart.
Use the
bar chart to
calculate the
mean, median
and mode.
1
2
3
4
5
6
Number of pupils absent from class.
The police did a survey
to see how many
people were present
in cars on a busy road.
The results are shown
in the bar chart.
Use the
bar chart to
calculate the
mean, median
and mode.
1
2
3
4
Number of people in a car
5
Throughout the month
of August last year the
number of hours of
sunshine was
recorded each day.
The results are
shown in the bar chart.
6
7
8
9
Hours of sunshine in a day
10
Use the
bar chart to
calculate the
mean, median
and mode.
An athlete is
training for a distance
run. Each day he records
how far he has run
and the results are shown.
The athlete claims he is
running an average of
at least 13 miles per day.
Is his claim justified?
Use the
bar chart to
calculate the
mean.
10
11
12
13 14 15 16
17
Number of miles run in a day.
```

20 cards

21 cards

17 cards

32 cards

24 cards