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# Applying statistics for smokers and nonsmokers

Dr. Z at the Clinic wishes to see whether the pulse rates of smokers are higher than the pulse rates of nonsmokers. Samples of 100 smokers and 100 nonsmokers are selected. The results are shown here. Can Dr. Z conclude, at alpha = 0.05, that the smokers have higher pulse rates than nonsmokers? Assume the samples come from a normal population. Use Minitab to help solve the problem if using statistical software.

Smokers
Sample mean = 90
Standard deviation = 5
Sample size = 100

Nonsmokers
Sample mean = 88
Standard deviation = 6
Sample size = 100

State the hypothesis:

Find the critical value:

Identify and Compute the test value:

Make a decision:

Interpret the results within the context of the problem:

#### Solution Preview

Dr. Z at the Clinic wishes to see whether the pulse rates of smokers are higher than the pulse rates of nonsmokers. Samples of 100 smokers and 100 nonsmokers are selected. The results are shown here. Can Dr. Z conclude, at  = 0.05, that the smokers have higher pulse rates than nonsmokers? Assume the samples come from a normal population. Use ...

#### Solution Summary

The solution applies statistics for smokers and non-smokers using minitab to determine is smokers have higher pulse rates.

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