Solution:
1. Mean: 76
2. Median: 76.5
3. Modes: 60, 63, and 88
Solution:
We have 20 values (n=20)
1. Mean
Mean=(88+89+65+62+83+63+74+64+71+82+66+88+79+60+86+63+93+99+ 60+85)/20
Mean=1,520/20
Mean=76
2. Median
First we must order the values from the smallest to the largest:
60, 60, 62, 63, 63, 64, 65, 66, 71, 74, 79, 82, 83, 85, 86, 88, 88, 89, 93, 99
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 15 17 18 19 20
The number of values is an even number, then the median is the average of the two central values, in this case the values 10th and 11th:
Median=(74+79)/2
Median=153/2
Median=76.5
3. Mode
The values most repeated are:
60 is twice
63 is twice
88 is twice
Then in this case we have three mode: 60, 63, and 88.
