A researcher wishes to estimate the proportion of adult males who are less than 5 feet 5 inches tall. She wants to be 90% confident that her estimate is within 4% of the true proportion (Round to the nearest whole number): (a) How large a sample should be taken if in a sample of 300 males, 30 were less than 5 feet 5 inches tall? (b) If no estimate of the sample proportion is available, how large should the sample be?

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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.