A Hypothesis Regarding the Weight of Newborn Infants at a Community

question 22

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 decision for a statistical significant change in average weights at birth at the 5% level of significance?

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

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