# A researcher is interested in the relationship between oral contraceptive (OC) use and blood pressure in...

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A researcher is interested in the relationship between oral contraceptive (OC) use and blood pressure in women. Suppose a sample of ten 35-to 39 year old nonpregnant, premenopausal OC users who work in a company and have a mean systolic blood pressure (SBP) of 132.86 mm Hg and sample standard deviation of 15.34 mm Hg are identified. A sample of 21 nonpregnant, premenopausal, non-OC users in the same age group are similarly identified who have mean SBP of 127. 44 mm Hg and a sample standard deviation of 18.23 mm Hg. A researcher assumes that the two groups are independent and normal will equal variances.
1. Using the p-value, does the underlying mean difference in blood pressure between the two groups differ from zero? Use the significance level α = 0.05.
2. Compute a 95% confidence interval for the true mean difference in systolic blood pressure (SBP) between 35 to 39 year old OC users and non-OC users. Interpret this result.
researcher assumes that the two groups are independent and normal will equal variances. 1. Using the p-value, does the underlying mean difference in blood pressure between the two groups differ from zero? Use the significance level a = 0.05. 2. Compute a 95% confidence interval for the true mean difference in systolic blood pressure (SBP) between 35 to 39 year old OC users and non-OC users. Interpret this result.
A researcher is interested in the relationship between oral contraceptive (OC) use and blood pressure in women. Suppose a sample of ten 35-to 39 year old nonpregnant, premenopausal OC users who work in a company and have a mean systolic blood pressure (SBP) of 132.86 mm Hg and sample standard deviation of 15.34 mm Hg are identified. A sample of 21 nonpregnant, premenopausal, non-OC users in the same age group are similarly identified who have mean SBP of 127. 44 mm Hg and a sample standard deviation of 18.23 mm Hg. A

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