(See Steps) With reference to the well-being of world nations another variable! often cited is the infant mortality rate. Sheet 42 on the data disk includes


Question: With reference to the well-being of world nations another variable! often cited is the infant mortality rate. Sheet 42 on the data disk includes a sample of infant mortality rates per 1,000 persons for such nations in 1990 and I997. Using a 0.05 level of significance, test whether the infant mortality rate improved from 1990 to 1997.

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