Question

A researcher wants to determine whether age is related to whether or not a tax credit would influence an adult to purchase a hybrid vehicle. A random sample of 1250 adults is selected and the results are classified as shown in the table.

Response	18-34	35-54	55 and older	Total
Yes	257()	189()	143()	589
No	218()	261()	182()	661
Total	475	450	325	1250

a) Identify the claim and state H0 and Ha.

b) determine the degrees of freedom

c) Calculate the expected count/frequency corresponding to each observed count(Round to the nearest tenth). Write in the "( )" by the observed counts.

d) Calculate the x^2 test statistic

e) Calculate the P-value and decide whether to reject the null hypothesis

f) Interpret the decision in the context of the researcher's claim.

Answer 1