A researcher collected a random sample of 2222 weeks of gasoline prices from January 20182018 to December 20222022. The sample mean price was $$2.87\2.87 $$per gallon, with a standard deviation of $$0.38\0.38 $$per gallon. Assume the prices are normally distributed. Construct a 95%95\% confidence interval for the population mean price per gallon.

2.70μ3.042.70\lt\mu\lt{3.04}{}

2.66μ3.082.66\lt{\mu}\lt{3.08}

2.82μ2.922.82\lt{\mu}\lt{2.92}

A researcher collected a random sample of 2222 weeks of gasoline ...

Confidence Intervals for Population Mean: Videos & Practice Problems