The Mean Weight of Newborn Infants at a Community Hospital

Multiple Choice

The mean weight of newborn infants at a community hospital is said to be 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 this sample support the original claim? What is the decision for 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 lb.
B) Reject the null hypothesis and conclude the mean is lower than 6.6 lb.
C) Reject the null hypothesis and conclude the mean is greater than 6.6 lb.
D) Cannot calculate because population standard deviation is unknown.