The Mean Systolic Blood Pressure for a Random Sample of 28

question 124

Multiple Choice

The mean systolic blood pressure for a random sample of 28 women aged 18 -24 is 112.4 mm Hg and the standard deviation is 12.8 mm Hg. Construct a 90% confidence interval for the standard deviation σ, of the systolic blood pressures of all women aged 18-24. Round to the nearest hundredth when necessary.

• A) (10.5, 16.55)
• B) (10.34, 16.17)
• C) (10.97, 15.63)
• D) (9.98, 17.92)

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