Originally Posted by kwtolley
Looks OK
RonL
For the grouped data
Score Frequency
90-100 8
80-89 12
70-79 26
60-69 14
total=60
An estimate of the mean is____
95*8+84.5*12+74.5*26+64.5*14=4614
4614/60=76.9
76.9 is my answer. Thanks very much for checking my answer. list of possible answers are -
1. 86.75
2. 76.9
3. 75.0
4. 15.0