The Mean Weight of Newborn Infants at a Community Hospital

question 132

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.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.

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Definitions:

Protein Binding

The interaction between a protein and another molecule, which could be another protein, a small molecule, or DNA, critical for many biological processes.

cAMP Levels

Concentrations of cyclic adenosine monophosphate, a secondary messenger important in many biological processes including signal transduction and intracellular communication.

CAP

A regulatory feature in some RNA molecules or a protein that can influence gene expression; context-dependent.

Glucose Levels

The concentration of glucose in the bloodstream, important for maintaining energy balance in the body.