Mathematics: The city s PR manager claimed the mean score of all ninth graders in the city was 83 (because the average of 81, 96, and 72 is 83). Of course, that is incorrect. Write a sentence or two to explain why this approach is incorrect.

The city s PR manager claimed the mean score of

AnaiyaKirksey8

19.01.2022

The city's PR manager was wrong because the mean score of all ninth graders in the city is 83.

Step-by-step explanation:

The given observations are:

81, 96 and 72

The total number of observations = 3

We know that,

Mean = $\dfrac{Sum of all observations}{Total number of observations}$

$=\dfrac{81+96+72}{3}$

$=\dfrac{249}{3}$

= 83

∴ The mean score of all ninth graders in the city = 83

The city's PR manager was wrong because the mean score of all ninth graders in the city is 83.

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jairus34

24.01.2020

$3 Is The independent variable

Step-by-step explanation:

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