A mountain trail is 12.1 miles long. If a hiker walks along the trail at a rate of 1.96 miles per hour, in approximately how many hours will the hiker walk the entire trail?

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?

If bill bought a home for $210,000 and he sold it a year later for $120,000 his percentage of loss is

A11 gram sample of a substance that’s used to treat thyroid disorders has a k-value of 0.1247