A medical researcher wants to compare the pulse rates of smokers and wants to te

Question

A medical researcher wants to compare the pulse rates of smokers and wants to test this claim at the 0.01 level of significance. A sample of 76 smokers has a mean pulse rate of 77, and a sample of 73 non-smokers has a mean pulse rate of 74. The population standard deviation of the pulse rates is known to be 7 for smokers and 9 for is different and Let ? be the true mean pulse rate for smokers and ?2 Step 3 of s: Find the p-value associated with the test statistic. Round your answer to four decimal places

Explanation / Answer

The statistical software output for this problem is:

Two sample Z summary hypothesis test:
?1 : Mean of population 1 (Std. dev. = 7)
?2 : Mean of population 2 (Std. dev. = 9)
?1 - ?2 : Difference between two means
H0 : ?1 - ?2 = 0
HA : ?1 - ?2 ? 0

Hypothesis test results:

Hence,

P value = 0.0235

Difference n1 n2 Sample mean Std. err. Z-stat P-value ?1 - ?2 76 73 3 1.3245097 2.2649891 0.0235

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