Confidence interval for the true average difference

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Reference no: EM1385817

A new drug to treat high cholesterol is being tested by pharmaceutical company. The cholesterol levels for 30 patients were recorded before administering the drug and after. The mean difference in total cholesterol levels (after - before) was 27.138 mg/dL with a standard deviation of 7.3685 mg/dL. Create a 95% confidence interval for the true average difference in cholesterol levels by the drug.

1) (25.0928, 29.1832)

2) (-24.3866, 29.8894)

3) (25.7927, 28.4833)

4) (24.3905, 29.8855)

5) (24.3866, 29.8894)

Reference no: EM1385817

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