Question

8) Nina says the mean of the scores 6, 7, 4,0 and 3 is 5 because she added the scores and divided by 4. Is she correct? Choose the correct answer below. * Nina is not correct. Although she took the correct steps to find the mean, her division is incorrect. Nina is not correct. She divided by 4 when she should have divided by 5. She may have not included the score of 0. Zero is a valid data value. Nina is not correct. After adding the scores, she should have multiplied by 4 rather than dividing. She is correct. She took the correct steps to find the mean and performed her calculations correctly.​

Answer 1

Nina is not correct because she divided by 4, whereas she should’ve divided by 5.

Explanation:

To find the mean, we add and divide by however many numbers. In this case, 6 + 7 + 4 + 0 + 3 = 20. Now, we divide by 5, because there are 5 scores in the data. This is where she went wrong, as she divided by 4. Instead, she should’ve divided by 5. This would’ve given her a mean of 4.