Calculator User Manual

1. Find Anthony’s average grade (weighted average).

2. What does the value of n given by the calculator

represent? What does the value of Òx given by the

calculator represent?

Reminder: The weighed average is

3. The teacher gave Anthony 4 more points on test 4 due to a

grading error. Find Anthony’s new average grade.

Anthony has an average (Ï) of 11.33 (to the nearest

hundredth).

On the calculator, n represents the total sum of the weights

n = 1 + 0.5 + 1 + 0.5.

Òx represents the weighted sum of his scores.

(12)(1) + (13)(0.5) + (10)(1) + (11)(0.5) = 34.

v v4

v"5

12 $13 $10 $11 $"1 $ 8

5 $1 $ 85 $

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(Your screen may not show

3:StatVars if you did not previously

perform a calculation.)

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Σx

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12()1() 13()0.5() 10()1() 11()0.5()+++

10.510.5+++

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