13. A survey finds that, given the choice, 34 females prefer males much taller than themselves, and 55 females prefer males only slightly taller than themselves.

A- What are Ha and Ho for this survey?

B- With alpha = .05, what would you conclude about the preference of females in the population?

15. In the general population, political party affiliation is 30% republican, 55% democratic and 15% other. To determine whether this distribution is also found among the elderly, in a sample of 100 senior citizens, we find 18 republicans, 64 democrats and 18 other.

A- What are Ha and Ho?

B- What is Fe for each group?

C- Compute X2obt

D- With alpha = .05, what do you conclude about party affiliation in the population of senior citizens?

16. A study similar to the one in problem 15 determines the frequency of the different political party affiliations for male and female senior citizens. (below is a graph in the worksheet) Each cell is marked by 10 spaces)

Male: 18 Republican 43
Democrat 14 Other

Female: 39 Republican 23
Democrat 18 Other

A- What are the Ha and Ho?

B- What is Fe in each cell?

C- Compute X2obt

D- With alpha = .05, what should we conclude about gender and party affiliation in the population of senior citizens?

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