Sarah has $20 saved. If she will save her allowance for the next 3 weeks, and she gets $10 per week for her allowance. At the en
1 answer:
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Answer: 0.17 ± 0.096
Step-by-step explanation:
Confidence interval for difference between the population proportion :
, where = sample proportion for population 1.
= sample proportion for population 2.
= Sample size from population 1.
= Sample size from population 1.
As per given , we have
Population
Critical z-value for 99% confidence level is z*=2.576 [By z-table]
Now , the 99% confidence interval estimate for the difference between the percentages of men and women who prefer Coca Cola over Pepsi :
\
Hence, the correct answer is 0.17 ± 0.096.