American Public University Measures of Central Tendency and Variability Project

Description

Homework Assignment #1 – Measures of Central Tendency and Variability (remember the equations below, for computing Z and the Variance):

  • You will need to take the 7 raw scores from the table below, fill in each space in the table, and answer questions A through F below.You need to make sure that you round everything to the hundredth decimal, as described in the Tegrity modules.
  • You will need to take the 7 raw scores from the table below, fill in each space in the table, and answer questions A through F below.You need to make sure that you round everything to the hundredth decimal, as described in the Tegrity modules.

Participant

Score

Sum of Squares

score

1

48

2

86

3

74

4

76

5

60

6

46

7

60

  • Mean =
  • Median =
  • Mode =
  • Variance ( =
  • Standard Deviation (=
  • What is the estimated percentile for the participant with the highest and lowest z-score above?
    • Lowest % & corresponding z-score =
    • Highest % & corresponding z-score =

Participant

Score

Sum of Squares

score

1

14

2

32

3

30

4

29

5

17

6

22

7

15

  • Mean =
  • Median =
  • Mode =
  • Variance ( =
  • Standard Deviation (=
  • What is the estimated percentile for the participant with the highest and lowest z-score above?
    • Lowest % & corresponding z-score =
    • Highest % & corresponding z-score =