In one of the studies, it was found that, in a random sample of261 married persons, 135 were smokers while in a sample of 239non-married persons there were 131 smokers.
a. Find a 90% confidence interval for the true difference inproportion of smokers among the married and non-marriedpopulations.
b. Based on the above interval, can one conclude that there is asignificant difference between the proportions of smokers in thetwo populations? Justify your answer
c. Do a formal hypothesis testing to test whether the twopopulations proportions are significantly different. Use ? = 0.10and a p-value method. Set up the appropriate null and alternativehypotheses. Is the conclusion same as the one in part(b)?
