Because of the test she did not take, Brandee scored a 9.75% lower average than her average score once her teacher allowed her to take the test again.
The average obtained once Brandee's teacher allowed him to present the missing test is much more accurate regarding Brandee's ability, this can be identified since it went from an average of 85.14% with 7 scores, to one of 84.25% with 8 scores, different from the average of 74.5% obtained thanks to that score of 0.
BRANDEE'S AVERAGE CALCULATION.
In the exercise, you can see Brandee's scores are: 80%, 92%, 91%, 75%, 89%, 84%, 0%, and 85%, if you calculate the average in that case:
- First Brandee's average = (80 + 92 + 91 + 75 + 89 + 84 + 0 + 85) / 8
- First Brandee's average = 74.5
But when Ms. Juarez allowed her to make up the missed test, in which she got 78%, The average increased too much:
- Second Brandee's average = (80 + 92 + 91 + 75 + 89 + 84 + 78 + 85) / 8
- Second Brandee's average = 84.25
As can be identified, most of Brandee's scores are above 80%, therefore, it is considered more accurate that her average is above this value, that is, it is an average that would represent much better the ability of Brandee.
You can see another exercise about average in the next link: https://brainly.com/question/20763190?referrer=searchResults
