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Coffee and blood pressure A scientist suspects that coffee increases blood pressure So he measures the systolic blood pressure of six random patients and then measures it again 30 minutes after they drink a single cup of caffeinated coffee The results are tabulated below Test the claim that coffee causes an increase in blood pressure Before Coffee After Coffee a Why are these paired data O Most of the After Coffee values are smaller than the corresponding Before Coffee values O This table does not have paired data there is no clear relationship between the data in each column O Each column contains data from the same patient O The after and before rows are the same size b Write the hypotheses in symbols Note that this problem uses Hdiff before after instead of diff after before so be careful O Ho Hdiff before after 0 Ha Hdiff before after 0 100 120 112 114 115 121 102 121 112 119 118 123 O Ho Hdiff before after 0 Ha Hdiff before after 0 O Ho Hdiff before after 0 Ha Hdiff before after 0 c Put the list of differences in your calculator and use T Test to find the p value P please round to four decimal places d What is the conclusion of the hypothesis test Since p 0 05 we do not have enough evidence to reject the null hypothesis Since p 0 05 we reject the null hypothesis and accept the alternative

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