In a survey of 1,000 randomly selected adults in the United States, participants were asked what their most favorite and least favorite subjects were when they were in school ( Associated Press, August 17, 2005). Math was chosen by 230 of the 1,000 as their favorite subject. Suppose you are interested in learning about the value of p, the propor-tion of all adults for whom math was their favorite subject in school. The following table is similar to the table that appears in Examples 8.4 and 8.5 and is meant to summarize what you know about the sampling distribution of ˆ p in the situation just described. The €œ What You Know€ information has been provided. Complete the table by filling in the €œ How You Know It€ column.

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What You Know How You Know it The sampling distribution of p is centered at the actual (but unknown) value of the population proportion An estimate of the standard deviation of p, which describes how much the P values spread out around the population proportion P, is 0.0133. The sampling distribution of p is approximately normal.