4. A researcher wishes to determine whether the blood pressure of vegetarians is, 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. Test the claim that vegetarians have lower blood pressure than non vegetarians. Use a 0.05 level of significance. Non Vegetarians Vegetarians n=85 Mean=124.1mmHg St dev-38.7mmHg n=75 Mean=138.7mmHg St dev=39.2mmHg

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