How large a sample would be necessary to estimate the true proportion defective in a large population within 5%, with 99% confidence? (Assume a pilot sample yields p = 0.5) %3D JWrit

MATLAB: An Introduction with Applications
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Chapter1: Starting With Matlab
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Q4,5
A sample of size n = 81 produced the sample mean of x = 50. Assuming the
population standard deviation o = 9, compute a 99% confidence interval for the
population mean µ.
1.
Given the following data:
10
2.
8 6 4
Construct a 95 % confidence interval estimate for the population mean.
A random sample of 1000 people shows that 100 are left-handed. Construct a 90%
confidence interval for the true proportion of left-handers.
3.
How large a sample would be necessary to estimate the true proportion defective
in a large population within 5%, with 99% confidence? (Assume a pilot sample
yields p = 0.5)
4.
5.
Write a short note on point estimate and confidence interval estimate.
Transcribed Image Text:A sample of size n = 81 produced the sample mean of x = 50. Assuming the population standard deviation o = 9, compute a 99% confidence interval for the population mean µ. 1. Given the following data: 10 2. 8 6 4 Construct a 95 % confidence interval estimate for the population mean. A random sample of 1000 people shows that 100 are left-handed. Construct a 90% confidence interval for the true proportion of left-handers. 3. How large a sample would be necessary to estimate the true proportion defective in a large population within 5%, with 99% confidence? (Assume a pilot sample yields p = 0.5) 4. 5. Write a short note on point estimate and confidence interval estimate.
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