Identify the level of measurement ( nominal/ordinal/interval/ratio) being employed in each case:

a) Year of graduation at Monroe

b) Country of birth ...

c) Years of age ..

d) Test grade of A, B, C, etc . ..

2- Use the frequency distribution below to calculate the percent ( by brand) of personal

Computers owned by the students at a College:

BRAND	FREQUENCY	PROPORTION	PERCENT
DELL	4,600
SONY	3,300
HEWLETT-PACKARD	2,500
TOSHIBA	7,500
GATEWAY	4,000

3- When asked how many times per week they utilize the internet to complete

homework assignments, 12 students replied as follows:

15 31 27 19 10 11 270 19 18 22 18 11

a) Calculate the mean ..

b) Calculate the median

c) Calculate the mode .

d) Which of these measures provides the most accurate measure of central tendency for

this set of data?

e) Explain why

4-For the study of the effectiveness of the effect of a weight loss drug, the following weigh

loss ( in pounds ) are recorded:

25361315111882810

a) Calculate the range. ..

b) Calculate the variance.

c) Calculate the standard deviation. .

5-Use the frequency distribution below to find the mode, the median and the mean

of the data.

X	FREQUENCY
11	10
12	11
16	4
18	18
20	9
25	5

a) Mode .

b) Median ..

c) Mean ..