A Hypothesis Regarding the Weight of Newborn Infants at a Community

question 9

Multiple Choice

A hypothesis regarding the weight of newborn infants at a community hospital is that the mean is 6.6 pounds. A sample of seven infants is randomly selected and their weights at birth are recorded as 9.0, 7.3, 6.0, 8.8, 6.8, 8.4, and 6.6 pounds. What is the sample variance?

• A) 1.177
• B) 6.6
• C) 1.385
• D) 7.6

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Definitions:

Salt

A mineral composed primarily of sodium chloride (NaCl), used as a seasoning and preservative in foods.

Amniocentesis

A process in which amniotic fluid is withdrawn by needle from the uterus and then examined for evidence of possible birth defects.

Ultrasound Scan

A medical imaging technique using high-frequency sound waves to visualize internal organs or a fetus in the womb.

Chorionic Villus Sampling

A prenatal test in which a sample of chorionic villi from the placenta is collected to test for fetal abnormalities.