# week 3 DB-3

Let’s practice with Weighted Mean.
Read rules how to calculate Weighted Mean
in Course Material posted for week 2.
How to calculate Weighted Mean (Links to an external site.)
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Give a detailed example of using a weighted mean. Look for an example that is different from the one below, unless you plan on becoming a teacher 🙂

1a. In your example, explain how the weighted mean can be a better average than another measure of center like the simple mean?

As a stats instructor you award a total 250 points for different assessments in the course. (The points are the weights and indicate how important you think each assessment is.)

The table below shows the assessments. It also shows the scores of two students on each assessment by the end of the semester.

Decide how each assessment should be weighted. That is, decide how many of the 250 points to give for each assessment.
Using your chosen weights, compute the class average for each of the two students.

AssessmentWeights J_ScoreJ_PointsD_ScoreD_PointsDB (30 mins. each week)  94 80 HW (2 hours each week)  80 94 Test 1 (Chaps 1-2)  94 84 Test 2 (Chaps 3-4)  96 86 Test 3 (Chaps 5-6)  98 88 Final (Chaps 1-6)  75 90 Term Project (15 pages)  75 90  Total =250
Weights = Decide the weight for each assessment. The total must be 250
J_Score = This column holds Jason’s actual scores on assessments (out of 100)                                        J_Points = Points towards the class grade from this assessment. Multiply the actual score by the weight.
D_Score and D_Points are similar to J_Score and J_Points but for Daphne.

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