1. The data below shows the amount of coffees bought by a class of students in a week.

3 0 2 4 0 3 0 0 0 1 3 1 2

1 1 1 5 2 1 3 1 1 2 2 3

4 2 2 2 2 3 3 3 2 2 2 4

2 2 5

Required:

(a) Draw a frequency table.

(b) Draw a histogram.

2. You are given the following data:

2 1 1 2 1 1 3 1 2 1 0

1 1 3 2 1 4 1 1 1 0 2

Required:

(a) Draw a histogram.

(b) Draw a frequency table.

(c) Draw a frequency polygon.

3. Calculate the mean and standard deviation for the following data:

100<120 4

120<140 6

140<160 9

160<180 12

180<200 15

200<220 9

220<240 10

4. Calculate the mean and standard deviation for the following data.

50 < 60 7

60 < 70 12

70 < 80 26

80 < 90 4

90 < 100 31

100 < 110 15

110 < 120 22