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Homework answers / question archive / -Use the given degree of confidence and sample data to construct a confidence interval for the population mean μ

a confidence interval for the population mean μ. Assume that the population has a normal distribution.

A laboratory tested twelve chicken eggs and found that the mean amount of cholesterol was 227 milligrams with s = 18.4 milligrams. Construct a 95% confidence interval for the true mean cholesterol content of all such eggs.

Group of answer choices

215.4 mg < μ < 238.6 mg

215.3 mg < μ < 238.7 mg

217.5 mg < μ < 236.5 mg

215.2 mg < μ < 238.8 mg

2.Use the given degree of confidence and sample data to construct a confidence interval for the population proportion p.

When 307 college students are randomly selected and surveyed, it is found that 128 own a car. Find a 99% confidence interval for the true proportion of all college students who own a car.

Group of answer choices

0.351 < p < 0.483

0.371 < p < 0.463

0.344 < p < 0.489

0.362 < p < 0.472

3.Use the confidence level and sample data to find a confidence interval for estimating the population μ. Round your answer to the same number of decimal places as the sample mean.

Test scores: n = 99, x? = 77.0, σ = 7.5; 99% confidence

Group of answer choices

75.8 < μ < 78.2

75.1 < μ < 78.9

75.5 < μ < 78.5

75.2 < μ < 78.8