Thread: Grouped data, check answer please

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

Originally Posted by kwtolley

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

Looks OK

RonL

thank you for checking my answer.