Smoking is a risk factor affecting patient's cardiovascular

system (and not only cardiovascular system, of course).

Jennifer was asked to take random samples of male Healthy

Life members recently admitted to hospitals in GTA with heart

attacks. She compiled two large separate files consisting of

those male residents of Toronto who smoked and those who

never smoked. The purpose of this research is to prove that the

first heart attack occurs at an earlier age if a patient smoked.

After carefully analyzing the data Jennifer came up with the

hypothesis that male smokers who suffer a first heart attack are, on average, seven years younger

than non-smoking males who suffer a first heart attack. The data are provided in the data file. Use

Data Analysis t-Test: Two-Sample Assuming Unequal Variances. Please help Jennifer Nguyen to

conduct the test at 5% significance level. As it is known that both samples come from normally

distributed populations, no histograms are required.