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(solution) Can someone please assist me with these questions?


Can someone please assist me with these questions?


THE MEANING OF VARIANCE AND THE STANDARD DEVIATION (The MEAN is the horizontal RED lin

 

The BLUE lines in the top graphs represent the positive (+) and negative (-) distances from the me

 

"X"

 

1

 

2

 

3

 

4

 

5

 

6

 

7

 

8

 

9

 

10

 


 

DATA SET "A"

 

9

 

5

 

8

 

6

 

12

 

2

 

13

 

1

 

10

 

4

 


 

DATA SET "B"

 

8.5

 

5.5

 

7

 

9

 

5

 

7

 

8

 

6

 

9.5

 

4.5

 


 

DATA SET "C"

 

7

 

7

 

7

 

7

 

7

 

7

 

7

 

7

 

7

 

7

 


 

MEAN

 


 

7

 


 

7

 


 

7

 


 

14

 

13

 

12

 

11

 

10

 

9

 

8

 

7

 

6

 

5

 

4

 

3

 

2

 

1

 

0

 


 

VARIANCE

 

STD DEV

 


 

DATA SET "B"

 


 

0

 


 

1

 


 

2

 


 

3

 


 

4

 


 

5

 


 

6

 


 

7

 


 

8

 


 

9

 


 

10

 


 

DATA SET

 

"A"

 

(1, 9)

 


 

0

 


 

1

 

14

 

13

 

12

 

11

 

10

 

9

 

8

 

7

 

6

 

5

 

4

 

3

 

2

 

1

 

0

 


 

2

 


 

3

 


 

4

 


 

5

 


 

DATA SET "C"

 


 

0

 


 

1

 


 

2

 


 

3

 


 

4

 


 

5

 


 

IN GRAPHS:

 

THE BOTTOM, HORIZONTAL AXIS IS THE "X-AXIS" ALSO CALLED THE ORDINATE AND IS THE "INDEPENDENT VARIABLE" (LIKE ED

 

IN THE GRAPHS ABOVE, THE X-VALUES SIMPLY REFER TO THE TEN DATA POINTS

 

THE VERTICAL AXIS IS THE "Y-AXIS" ALSO CALLED THE ABSCISSA AND IS THE "DEPENDENT VARIABLE" (INCOME DEPENDS ON ED

 

IN GRAPHS EACH DATA POINT IS IDENTIFIED BY ITS X AND Y COORDINATES (X,Y). FOR EXAMPLE DATA POINT 1 IN DATA SET "A"

 


 

AN is the horizontal RED line)

 

(-) distances from the mean

 


 

ATA SET

 

A"

 


 

1

 


 

0

 


 

+6

 


 

-5

 


 

2

 


 

3

 


 

4

 


 

5

 


 

6

 


 

7

 


 

8

 


 

9

 


 

10

 


 

DATA SET "C"

 


 

1

 


 

2

 


 

3

 


 

4

 


 

5

 


 

6

 


 

7

 


 

8

 


 

9

 


 

10

 


 

NDEPENDENT VARIABLE" (LIKE EDUCATION VERSES INCOME WHERE EDUCATION IS THE INDEPENDENT VARIABLE )

 


 

RIABLE" (INCOME DEPENDS ON EDUCATION)

 

PLE DATA POINT 1 IN DATA SET "A" WOULD BE (1, 9)

 


 

 


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