weighted mean - class average (desk work 6)

3.1 - 1

Desk Work 6: Class AverageIn our class your course grade or average is determined by the following weights given in our syllabus.

Component PercentTest 1 15%

Test 2 15%

Test 3 15%

Web based Homework Assignments 20%

Project 10%

Final 25%

3.1 - 2

Desk Work 6: Class AverageCalculate a students class average based on the following grades.

Component Percent GradeTest 1 15% 76

Test 2 15% 68

Test 3 15% 77

Web based Homework Assignments 20% 100

Project 10% 100

Final 25% 79

3.1 - 3

Desk Work 6: Class AverageCalculate a students class average based on the following grades.

Component Percent GradeTest 1 15% 76

Test 2 15% 68

Test 3 15% 77

Web based Homework Assignments 20% 100

Project 10% 100

Final 25% 79

Class average is calculated using a weighted mean

3.1 - 4

Desk Work 6: Class AverageCalculate a students class average based on the following grades.

Component Percent GradeTest 1 15% 76

Test 2 15% 68

Test 3 15% 77

Web based Homework Assignments 20% 100

Project 10% 100

Final 25% 79

Class average is calculated using a weighted mean

w

xwX

)(

3.1 - 5

Desk Work 6: Class AverageCalculate a students class average based on the following grades.

Component Percent, w Grade, xTest 1 15% 76

Test 2 15% 68

Test 3 15% 77

Web based Homework Assignments 20% 100

Project 10% 100

Final 25% 79

Class average is calculated using a weighted mean→ the grades are your x variable

→ the percentages are your weights w

3.1 - 6

Example 10: Class AverageCalculate a students class average based on the following grades.

Component Percent, w Grade, xTest 1 15% 76

Test 2 15% 68

Test 3 15% 77

Web based Homework Assignments 20% 100

Project 10% 100

Final 25% 79

w

xwX

)( Create a column for w∙x

3.1 - 7

Desk Work 6: Class AverageCalculate a students class average based on the following grades.

Component Percent, w Grade, x w∙x

Test 1 15% 76

Test 2 15% 68

Test 3 15% 77

Web based Homework Assignments 20% 100

Project 10% 100

Final 25% 79

w

xwX

)( Create a column for w∙x

3.1 - 8

Desk Work 6: Class AverageCalculate a students class average based on the following grades.

Component Percent, w Grade, x w∙x

Test 1 15% 76 15(76) = 1140

Test 2 15% 68

Test 3 15% 77

Web based Homework Assignments 20% 100

Project 10% 100

Final 25% 79

w

xwX

)( Create a column for w∙x

3.1 - 9

Desk Work 6: Class AverageCalculate a students class average based on the following grades.

Component Percent, w Grade, x w∙x

Test 1 15% 76 15(76) = 1140

Test 2 15% 68 15(68) = 1020

Test 3 15% 77

Web based Homework Assignments 20% 100

Project 10% 100

Final 25% 79

w

xwX

)( Create a column for w∙x

3.1 - 10

Desk Work 6: Class AverageCalculate a students class average based on the following grades.

Component Percent, w Grade, x w∙x

Test 1 15% 76 15(76) = 1140

Test 2 15% 68 15(68) = 1020

Test 3 15% 77 15(77) = 1155

Web based Homework Assignments 20% 100

Project 10% 100

Final 25% 79

w

xwX

)( Create a column for w∙x

3.1 - 11

Desk Work 6: Class AverageCalculate a students class average based on the following grades.

Component Percent, w Grade, x w∙x

Test 1 15% 76 15(76) = 1140

Test 2 15% 68 15(68) = 1020

Test 3 15% 77 15(77) = 1155

Web based Homework Assignments 20% 100 20(100) = 2000

Project 10% 100

Final 25% 79

w

xwX

)( Create a column for w∙x

3.1 - 12

Desk Work 6: Class AverageCalculate a students class average based on the following grades.

Component Percent, w Grade, x w∙x

Test 1 15% 76 15(76) = 1140

Test 2 15% 68 15(68) = 1020

Test 3 15% 77 15(77) = 1155

Web based Homework Assignments 20% 100 20(100) = 2000

Project 10% 100 10(100) = 1000

Final 25% 79

w

xwX

)( Create a column for w∙x

3.1 - 13

Desk Work 6: Class AverageCalculate a students class average based on the following grades.

Component Percent, w Grade, x w∙x

Test 1 15% 76 15(76) = 1140

Test 2 15% 68 15(68) = 1020

Test 3 15% 77 15(77) = 1155

Web based Homework Assignments 20% 100 20(100) = 2000

Project 10% 100 10(100) = 1000

Final 25% 79 25(79) = 1975

w

xwX

)( Create a column for w∙x

3.1 - 14

Desk Work 6: Class AverageCalculate a students class average based on the following grades.

Component Percent, w Grade, x w∙x

Test 1 15% 76 15(76) = 1140

Test 2 15% 68 15(68) = 1020

Test 3 15% 77 15(77) = 1155

Web based Homework Assignments 20% 100 20(100) = 2000

Project 10% 100 10(100) = 1000

Final 25% 79 25(79) = 1975

w

xwX

)( Sum the column for w∙x

3.1 - 15

Desk Work 6: Class AverageCalculate a students class average based on the following grades.

Component Percent, w Grade, x w∙x

Test 1 15% 76 15(76) = 1140

Test 2 15% 68 15(68) = 1020

Test 3 15% 77 15(77) = 1155

Web based Homework Assignments 20% 100 20(100) = 2000

Project 10% 100 10(100) = 1000

Final 25% 79 25(79) = 1975

w

xwX

)( Sum the column for w∙xΣ(w∙x) = 8290

3.1 - 16

Desk Work 6: Class AverageCalculate a students class average based on the following grades.

Component Percent, w Grade, x w∙x

Test 1 15% 76 15(76) = 1140

Test 2 15% 68 15(68) = 1020

Test 3 15% 77 15(77) = 1155

Web based Homework Assignments 20% 100 20(100) = 2000

Project 10% 100 10(100) = 1000

Final 25% 79 25(79) = 1975

w

xwX

)(

Sum the column of w

Σ(w∙x) = 8290

3.1 - 17

Desk Work 6: Class AverageCalculate a students class average based on the following grades.

Component Percent, w Grade, x w∙x

Test 1 15% 76 15(76) = 1140

Test 2 15% 68 15(68) = 1020

Test 3 15% 77 15(77) = 1155

Web based Homework Assignments 20% 100 20(100) = 2000

Project 10% 100 10(100) = 1000

Final 25% 79 25(79) = 1975

w

xwX

)( Sum the column for w∙xΣ(w∙x) = 8290 Σw = 100

3.1 - 18

Desk Work 6: Class AverageCalculate a students class average based on the following grades.

Component Percent, w Grade, x w∙x

Test 1 15% 76 15(76) = 1140

Test 2 15% 68 15(68) = 1020

Test 3 15% 77 15(77) = 1155

Web based Homework Assignments 20% 100 20(100) = 2000

Project 10% 100 10(100) = 1000

Final 25% 79 25(79) = 1975

w

xwX

)(Σ(w∙x) = 8290 Σw = 100

3.1 - 19

Desk Work 6: Class AverageCalculate a students class average based on the following grades.

Component Percent, w Grade, x w∙x

Test 1 15% 76 15(76) = 1140

Test 2 15% 68 15(68) = 1020

Test 3 15% 77 15(77) = 1155

Web based Homework Assignments 20% 100 20(100) = 2000

Project 10% 100 10(100) = 1000

Final 25% 79 25(79) = 1975

1008290)(

w

xwX

Σ(w∙x) = 8290 Σw = 100

3.1 - 20

Desk Work 6: Class AverageCalculate a students class average based on the following grades.

Component Percent, w Grade, x w∙x

Test 1 15% 76 15(76) = 1140

Test 2 15% 68 15(68) = 1020

Test 3 15% 77 15(77) = 1155

Web based Homework Assignments 20% 100 20(100) = 2000

Project 10% 100 10(100) = 1000

Final 25% 79 25(79) = 1975

9.821008290)(

w

xwX

Σ(w∙x) = 8290 Σw = 100

3.1 - 21

Desk Work 6: Class AverageCalculate a students class average based on the following grades.

Component Percent, w Grade, x w∙x

Test 1 15% 76 15(76) = 1140

Test 2 15% 68 15(68) = 1020

Test 3 15% 77 15(77) = 1155

Web based Homework Assignments 20% 100 20(100) = 2000

Project 10% 100 10(100) = 1000

Final 25% 79 25(79) = 1975

9.821008290)(

w

xwX

Σ(w∙x) = 8290 Σw = 100

This student’s class average is an 82.9 or a B.