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Using the Z value
where µ is the population mean
x is the sample mean
d is the standard deviation
Ho:The Atenolol intake does not reduce systolic blood pressure
H1:The Atenolol intake reduce systolic blood pressure
Compare the value with z critical at 5% level of significance
Since the z calculated is more than z critical,we reject the null hypothesis and conlcude that Atenolol intake reduce systolic blood pressure.
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