Understanding Basic Statistics 6th Edition by Charles Henry Brase,Corrinne Pellillo Brase

تمرين 10

Critical thinking Lurking Variables Over the past 30 years in the United States, there has been a strong negative correlation between the number of infant deaths at birth and the number of people over age 65.
(a) Is the fact that people are living longer causing a decrease in infant more-talitics at birth
(b) What lurking variables might be causing the increase in one or both of the variables Explain.