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Alenkasestr
7 days ago
11

Kirsten calculated the mean of 10 quiz scores. Later she was told there was an error in grading one of her quizzes. A quiz score

of 79 was revised to 89.
How will this grading revision affect the calculated mean of Kirsten's quiz scores?
Answer Options with 4 options
A. The mean will stay the same.
B. The mean will be 1 point higher.
C. The mean will be 5 points higher.
D. The mean will be 10 points higher.
Mathematics
2 answers:
lawyer [9.2K]7 days ago
3 0
The correct choice is D. The average will increase by 10 points. The problem states that one quiz score was revised from 79 to 89, which is a difference of 10 points. I hope this response is useful.:)
Leona [9.2K]7 days ago
3 0
The average will increase by 5 points, therefore, option c is correct!
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The midpoint formula states that the midpoint between points (a, b) and (c, d) is ((a + c)/2, (b + d)/2).

Let T be (h, k). According to the problem:

\left(\dfrac{-9+h}{2},\dfrac{4+k}{2}\right)=(2,-1)\\\\\\\Rightarrow \dfrac{-9+h}{2}=2\\\\\Rightarrow -9+h=4\\\\\Rightarrow h=4+9\\\\\Rightarrow h=13

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To determine an equivalent for RootIndex 3 StartRoot 8 EndRoot Superscript x, we can proceed with =2^x

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Notably, 8 can be broken down into 2 multiplied by itself three times = 2^3

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Using these principles:

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