.    A medical researcher wishes to see whether the pulse rate of smokers are higher than the pulse rates of non-smokers.  Samples of 100 smokers and 100 nonsmokers are selected. The results are shown below.  Can the researcher conclude at an alpha = 0.05, that smokers have higher pulse rates than nonsmokers?     Smokers Non-Smokers Mean = 90 Mean = 88 Standard Deviation = 5 Standard Deviation = 6

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