In a sample of 42 iPhones, 17 had over 97 apps downloaded. Construct a 99% confidence interval for the population proportion of all iPhones that obtain over 97 apps. Assume 20.005 -2.576. Multiple Choice O 0.17 ± 0.20 017: 0.09 0.40 ±0.19 0.40 10.20

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Q: Out of 200 people sampled, 42 had kids. Based on this, construct a 95% confidence interval for the…

A: For 95% confidence intervalα=1-CI=1-0.95=0.05So, zα2=z0.052=z0.025=1.96

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Q: What is the value of Z for this confidence interval?

A: Given,sample size(n)=14795no.of people who said yes=2219no.of people who said no =12576

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Q: Use the Student's t distribution to find tc for a 0.99 confidence level when the sample is 21.

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