A researcher wishes to determine whether the blood pressure of vegetarians is, on average, lower than the blood pressure of nonvegetarians. Independent simple random samples of 85 vegetarians and 75 nonvegetarians yielded the following sample statistics for systolic blood pressure: Vegetarians Nonvegetarians sample size n = 85 n = 75 sample mean x = 124.1 mmHg x = 138.7 mmHg sample standard deviation s = 38.7 mmHg s = 39.2 mmHg Use a significance level of 0.01 to test the claim that the mean systolic blood pressure of vegetarians is lower than the mean systolic blood pressure of nonvegetarians.
A researcher wishes to determine whether the blood pressure of vegetarians is, on average,
lower than the blood pressure of nonvegetarians. Independent simple random samples of 85
vegetarians and 75 nonvegetarians yielded the following sample statistics for systolic blood
pressure:
Vegetarians Nonvegetarians
sample size n = 85 n = 75
sample mean x = 124.1 mmHg x = 138.7 mmHg
sample standard deviation s = 38.7 mmHg s = 39.2 mmHg
Use a significance level of 0.01 to test the claim that the mean systolic blood pressure of
vegetarians is lower than the mean systolic blood pressure of nonvegetarians.
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