The Census Bureau claims that the expected frequency distribution of ethnic background of the New York city population is 30% of Hispanic, 50% of White and 20% of Others. The manager of a large housing complext in the city took a sample from his complex and found that there are 200 Hispanics, 350 Whites and 100 Others. He wanted to test the claim that the actual ethnic backgound distribution from his housing complex agrees with the Census Bureau's claimed distribution using a significance level of 0.05. Answer questions 4-7.

4. State the null and alternative hypotheses.

Question 4 options:

a)	H0: The frequencies of ethnic background of people in the complex are all equal. Ha: The frequencies of ethnic backgound of people in the complex are all different.

b)	H0: The frequencies of ethnic background of people in the complex are all equal. Ha: At least one of the ethic frequency is different from the others in the complex.

c)	H0: The frequencies of ethnic background of the people in the complex are 30% of Hispanic, 50% of White and 20% of Others. Ha: At least one of the ethnic frequency is different from the others in the complex.

d)	H0: The housing complex is independent of the Census Bureau. Ha: The housing complex is not independent of the Census Bureau