In a Manufacturing Process a Random Sample of 9 Bolts

question 24

Multiple Choice

In a manufacturing process a random sample of 9 bolts manufactured has a mean length of 3cm with a variance of 0.09.Assuming bolt length is normally distributed,what is the 90% confidence interval for the true mean length of the bolt?

• A)2.8355 to 3.1645
• B)2.5065 to 3.4935
• C)2.4420 to 3.5580
• D)2.8140 to 3.8160
• E)2.9442 to 3.0558

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Definitions:

Auscultated Blood Pressure

Blood pressure as measured by listening with a stethoscope.

Palpatory Method

A technique used in medicine to feel the body with hands to determine the size, consistency, and location of certain body parts or abnormalities.

Korotkoff Sounds

The sounds a doctor listens for when taking blood pressure with a stethoscope and sphygmomanometer, marking the systolic and diastolic pressures.

Systolic Pressure

The blood pressure measured when the left ventricle of the heart contracts.