HOMEWORK #5

 Person Age at last Birthday Political Party A 30 years Demo B 28 Rep C 30 Ind D 27 Demo E 28 Demo F 29 Rep G 24 Ind

1. Make a frequency distribution including the cumulative frequencies and cumulative proportions for age with the first category as "23 -25 years".

2. Compute the midpoints of each category in question #1.

3. Make a frequency polygon for age, using the data in question #1.

4. Make a bar graph for political party.

HOMEWORK #5.1

Community A has 100 businessmen, 105 managers and 308 hourly workers.

Community B has 401 hourly workers, 15 businessmen and 5 managers.

Rearrange your data into an order which will facilitate computations, and compute and interpret the appropriate statistics to answer these questions:

1. What is the typical or average occupation in Community A?

2. What is the typical or average occupation in Community B?

3. Measure dispersion in each community.

4. Is there more diversity (or dispersion) in occupations in Community A or Community B?

5. Compute the confidence intervals of proportions for both community A & B treating the above data as a sample with a 95% confidence level.

6. Compute a two sample T-test of proportions to find out if the difference in the proportions above are generalizeable to the whole population?

HOMEWORK 5.2
 Community I Community II Social Class f f I 10 1 II 5 9 III 75 40 IV 5 45 V 6 5 101 100

1. Calculate the median for both Community I and Community II.

2. Calculate IQV for both Community I and Community II, and interpret your results.