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From a students population in a school district a sample of five is taken and the...

From a students population in a school district a sample of five is taken and the final grafed of their physics and algebra are below.

If a student recieves a 75 in algebra what is the predictiom of her final physics

Algebra 75. 71. 98. 84. 75
Phisics. 82. 80. 95. 89. 82
Math   Statistics-And-Probability   
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Answer #1

We make a fundamental assumption that her performences in Algebra and Physics are alike.


Average of algebra is 80.6
Average of Physics is 85.6

Student scores 75 in algebra which is below the mean.

There are 3 enteries below the mean for algebra: 75,75 and 71
Student is below average but now the worst performer.

There are 3 enteries below the mean for physics: 82,82 and 80
Since student is below average or below the mean, but not the worst performer, it is safe to predict her physics final score to be 82.



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