Answer:
5 7 8 9 9 10 12 13 15 22
Mean: 11
Median: 11
Mode: 9
Variance: 20.2
Standard Deviation: 4.49
Step-by-step explanation:
Mean: add all the scores divide it into their count
Median: arrange from lowest to highest then get the midpoint
Mode: choose the most repeating numbers
Variance: Class - mean and then square
Standard Deviation: Square root Variance