A dataset can contain a range of values that depict a certain characteristic, such as grades on tests in a class during the semester. A specific student has so far received the following grades: 76,81, 78, 87, 75, and 72. There is one final test in the semester.
What minimum grade would the student need to achieve on the last test to get an 80% average?
Answer(s): C
Explanation:
To calculate the minimum grade needed to achieve an 80% average, we can use the following formula:
minimum grade = (target average * number of tests - sum of grades) / (number of tests - 1) Plugging in the given values, we get:
minimum grade = (80 * 7 - (76 + 81 + 78 + 87 + 75 + 72)) / (7 - 6) minimum grade = (560 - 469) / 1 minimum grade = 91
Therefore, the student needs to score at least 91 on the last test to get an 80% average.
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