A Random Sample of 9 TI-89 Titanium Calculators Being Sold $\begin{array} { l l l l l } \hline 135 & 163 & 152 & 153 & 138 \\\hline 164 & 160 & 149 & 157 & \\\hline\end{array}$

question 12

Multiple Choice

A random sample of 9 TI-89 Titanium calculators being sold over the internet had the following prices, in dollars.
$\begin{array} { l l l l l } \hline 135 & 163 & 152 & 153 & 138 \\\hline 164 & 160 & 149 & 157 & \\\hline\end{array}$
Assume the population standard deviation is ı = 28 and that the population is approximately normal. Construct a 95% confidence interval for the mean price for all the TI-89's being sold over the internet.

• A) (134.0,170.6)
• B) (145.6,159.1)
• C) (145.5,159.2)
• D) (97.5,207.2)

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Definitions:

Ions

Atoms or molecules with a net electric charge due to the loss or gain of one or more electrons.

Molecules

The smallest unit of a chemical compound that can retain the chemical properties of the compound, consisting of one or more atoms bonded together.

First Law of Thermodynamics

This principle states that energy cannot be created or destroyed, only transformed from one form to another, implying that the total energy in an isolated system remains constant.

Concentrated Energy

Energy that is intensified or focused within a small area or volume, often for the purpose of efficient transmission or usage.