The Food Marketing Institute shows that 15% of households spend more than $100 per week on groceries. Assume the population proportion is p = 0.15 and a sample of 600 households will be selected from the population. Use z-table.
Calculate (), the standard error of the proportion of households spending more than $100 per week on groceries (to 4 decimals).
What is the probability that the sample proportion will be within +/- 0.02 of the population proportion (to 4 decimals)?
What is the probability that the sample proportion will be within +/- 0.02 of the population proportion for a sample of 1,500 households (to 4 decimals)?
When n=1500,
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