The Mean Weight of Newborn Infants at a Community Hospital

question 67

Multiple Choice

The mean weight of newborn infants at a community hospital 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. Does the sample data show a significant increase in the average birthrate at a 5% level of significance?

• A)Fail to reject the null hypothesis and conclude the mean is 6.6 pounds.
• B)Reject the null hypothesis and conclude the mean is lower than 6.6 pounds.
• C)Reject the null hypothesis and conclude the mean is greater than 6.6 pounds.
• D)Cannot calculate because the population standard deviation is unknown.

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Definitions:

CA

A term often used to abbreviate cancer or carcinoma, indicating a variety of diseases characterized by the uncontrolled division of abnormal cells.

Meaning

The significance or understanding conveyed by a word, phrase, sentence, or text.

Lymphangiosarcoma

A rare and aggressive form of cancer that develops from the lymphatic system, often associated with chronic lymphedema.

Combining Form

A linguistic element used in the construction of medical and scientific terminology that generally consists of a root and a vowel to ease pronunciation when combined with another form.