Calculating the Mean from a Frequency Distribution

Number of alcoholic beverages consumed by a sample of college students last weekend. (This data is fictitious.)

x
value

f
(frequency)   

 f(x)
multiply
0 5 0
1 10 10
2 5 10
3 10 30
4 5 20
10 2 20
Sum: 37 90

 

Step 1.  Multiply f(x)

Step 2.  Sum f, Sum f(x)

Step 3: f(x)/n:   90/37=2.43