The given percentage scores are:
80 , 92 , 91 , 75 , 89 , 84 , 0 , 85
A. Calculate the average
So, the average = (sum of the scores)/(number of the scores)
Sum of the scores = 80 + 92 + 91 + 75 + 89 + 84 + 0 + 85 = 596
The number of the scores = 8
So,
The average = 596/8 = 74.5%
Does the average score really represent her abilities ?
No, because there is outlier which is ( 0 ) which mean it may be absent this test
the other scores are within 75 and 92
Which mean the average is less than the reasonable minimum score
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B. Brandee received 78% at the missed test
so, we will find the new mean:
The new sum of the scores = 80 + 92 + 91 + 75 + 89 + 84 + 78 + 85 = 674
The new mean = 674/8 = 84.25%
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C. What different did 0% score make ?
So, 0% give us not accurate representation of the student abilities
Does this new mean represent her abilities accurately ?
Yes