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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