II. Measure of Central Tendency / Measures of Variability

Question 1

The following list shows the number of workers with different hair colors in a dataset of 171 people.

Brown hair: 54
Black hair: 62
Gray hair: 25
Dark brown hair: 15
Ash brown hair: 15

What is the mean value?

Answer 1

34.2

Question 2

The following list shows the number of workers with different hair colors in a dataset of 171 people.

Brown hair: 54
Black hair: 62
Gray hair: 25
Dark brown hair: 15
Ash brown hair: 15

What is the median value?

Answer 2

25

Question 3

The following list shows the number of workers with different hair colors in a dataset of 171 people.

Brown hair: 54
Black hair: 62
Gray hair: 25
Dark brown hair: 15
Ash brown hair: 15

What is the mode value?

Answer 3

15

Question 4

Consider the following data: 20 teachers were asked to evaluate the recent Professional Dev’t session and their response were:
1(SD): 2
2(D): 3
3(A): 6
4(SA): 4

What is the weighted mean?

Answer 4

2.8

Question 5

What is the mean of grouped data if FiXi = 34,521 and n = 45?

Answer 5

767.13