A researcher studying the effects of income levels on breastfeeding of infants hypothesizes that countries where the income level is lower have a higher rate of infant breastfeeding than higher income countries. It is known that in Germany, considered a high-income country by the World Bank, 22% of all babies are breastfeed. In Tajikistan, considered a low-income country by the World Bank, researchers found that in a random sample of 500 new mothers that 125 were breastfeeding their infants. Find a 90% confidence interval of the proportion of mothers in low-income countries who breastfeed their infants?

X = random variable _________________________________________________________________

P = parameter _____________________________________________________________________

Simple random sample > 30? _________________ np 5? ___________ nq 5? ___________

Enter information into 1-PropZINT

C-Level ? _________ X = ____________ N = ______________

Interval ______________________________________________

P(hat) = ______________________________ E = ____________________________

Statistical Interpretation:

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Real World Interpretation:

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