1.96 square root (0.43)(0.57)/1487= 0.0251636 how did they get that answer on page 305 of Elementary Statistics. It tells how to do it on the calculator but it comes out 0.000493. Am I putting it in wrong. How should it be? Thank you in advance for your help, Koreen Cortez

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Estimation

A new framework of data analysis where the new statistical methods are used for interpreting the results and analyzing the data is known as estimation in statistics.