Dominic is buying supplies for his poetry class. He likes to write his poems in black ink, then decorate the pages with colorful drawings. The Mega Writer pack has 6 colored pens and 9 black pens. The Mini Writer pack has 3 colored pens and 6 black pens. Do the packs have the same ratio of colored pens to black pens?

Use the given degree of confidence and sample data to construct a confidence interval for the population mean mu . assume that the population has a normal distribution. a laboratory tested twelve chicken eggs and found that the mean amount of cholesterol was 185 milligrams with sequals 17.6 milligrams. a confidence interval of 173.8 mgless than muless than 196.2 mg is constructed for the true mean cholesterol content of all such eggs. it was assumed that the population has a normal distribution. what confidence level does this interval represent?