Question

A medical researcher wants to compare the pulse rates of smokers and non-smokers. He believes that the pulse rate for smokers and non-smokers is different and wants to test this claim at the 0.050.05 level of significance. A sample of 7777 smokers has a mean pulse rate of 7979, and a sample of 7979 non-smokers has a mean pulse rate of 7676. The population standard deviation of the pulse rates is known to be 99 for smokers and 66 for non-smokers. Let μ1μ1 be the true mean pulse rate for smokers and μ2μ2 be the true mean pulse rate for non-smokers.

Step 1 of 5 :  

State the null and alternative hypotheses for the test.

Answer 1