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?

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Definitions:

Minimum-Wage Law

Legislation that establishes the lowest hourly wage that employers can legally pay their workers.

Equilibrium Wage

The wage rate at which the quantity of labor demanded by employers equals the quantity of labor supplied by workers.

Labor Supplied

The total number of hours that workers are willing and able to work at a given wage rate.

Minimum Wage

The lowest legal wage that employers can pay to workers, aimed at protecting workers from unduly low pay.