Homework Answers
Sample size = Z2
/2
* [ p1(1-p1) + p2 (1 - p2) ] / E2
= 2.332 * ( 0.5 * 0.5 + 0.5 * 0.5) / 0.062
=754.014
Sample size = 754(Rounded up to nearest integer)
n1 = n2 = 754
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You may need to use the appropriate appendix table or technology
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17% of households spend more than $100 per week on groceries.
Assume the population proportion is p = 0.17 and a sample of 500
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