Calculate the mean of a set of data Statistics & Probabilities

Calculate the mean of the following sets of data.

Value	Frequency
1	3
4	5
7	8

\dfrac{79}{16}

4

\dfrac{16}{3}

15.5

Value	Frequency
2	4
4	10
5	2
19	1

\dfrac{77}{17}

\dfrac{15}{2}

4

3

Value	Frequency
4	1
7	1
16	1
17	2
20	2

\dfrac{101}{7}

\dfrac{101}{5}

15

\dfrac{64}{7}

Value	Frequency
1	2
2	6
5	2
6	2

3

2

\dfrac{1}{4}

9

\{2, 3, 5, 7, 9, 12, 13, 15\}

\dfrac{33}{4}

\dfrac{61}{8}

8

12.25

\{1, 1, 2, 3, 6, 7, 7, 7, 8, 10\}

5.2

5

5.1

7

Value	Frequency
5	15
6	2
7	1
10	3
14	4

7.2

7.5

7.4

\dfrac{30}{7}