A Scientist Is Estimating the Mean Lifetime of a Newly-Discovered

question 35

Short Answer

A scientist is estimating the mean lifetime of a newly-discovered insect.From a sample of 88 insects,she finds a sample mean of 49.2 days.Suppose that the population standard deviation of all lifetimes is 2.500 days.What are the boundaries for a 90% confidence interval for the mean lifetime of the insect,rounded to two decimal places?

---

Definitions:

Edward Gorsuch

A Maryland slave owner known for his death during the Christiana Riot of 1851, an event that intensified the pre-Civil War conflict between slave states and free states.

Christiana Riot

An armed resistance that occurred in 1851 in Pennsylvania, where African American slaves and free blacks fought against a federal attempt to capture fugitives under the Fugitive Slave Act, symbolizing resistance against slavery.

Fugitive Slaves

Individuals who escaped from slavery to seek freedom from their enslavers, particularly in the United States before the abolition of slavery.

James McCune Smith

The first African American to earn a medical degree, achieving this distinction in 1837, and a prominent abolitionist and intellectual of the 19th century.