Welcome, Wendy...

BCPS Focus Portal

GoGuardian$\_$HOM...

Websketch Tool Li$...$

Desmos $|$ Graphin...

Gradebook

Question $10$ of $14$

$\frac{-}{2}$

View Policies

Current Attempt in Progress

Topical Painkiller Ointment

The use of topical painkiller ointment or gel rather than pills for pain relief was approved just within the last few years in the US for prescription use only. ${?}^1$ Insurance records show that the average copayment for a month's supply of topical painkiller ointment for regular users is $$30.$ A sample of size $n=75$ regular users found a sample mean copayment of $$27\mathrm{.}90.$

${?}^1$ Tarkan, L$.,$ "Topical Gel Catches up with Pills for Relief," The New York Times, September $6,2010.$

$($a$)$ Identify each of $30$ and $27\mathrm{.}90$ as a parameter or a statistic.

$30$ is a

$27\mathrm{.}90$ is a

eTextbook and Media

Hint

$($b$)$ Give the annropriate notation for $30.$