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People end up tossing 12% of what they buy at the grocery store (Reader's Digest, March...

People end up tossing 12% of what they buy at the grocery store (Reader's Digest, March 2009). Assume this is the true population proportion and that you plan to take a sample survey of 540 grocery shoppers to further investigate their behavior. Use z-table. Show the sampling distribution of (), the proportion of groceries thrown out by your sample respondents (to 4 decimals). p = 0.12 standard error of the proportion σ( ) = What is the probability that your survey will provide a sample proportion within ±.03 of the population proportion (to 4 decimals)? 0.9676 What is the probability that your survey will provide a sample proportion within ±.015 of the population proportion (to 4 decimals)? 0.7154

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