A Random Sample of 9 TI-89 Titanium Calculators Being Sold $\begin{array} { l l l l l } \hline 151 & 160 & 136 & 132 & 140 \\\hline 151 & 137 & 119 & 145 & \\\hline\end{array}$

question 23

Multiple Choice

A random sample of 9 TI-89 Titanium calculators being sold over the internet had the following prices, in dollars.

$\begin{array} { l l l l l } \hline 151 & 160 & 136 & 132 & 140 \\\hline 151 & 137 & 119 & 145 & \\\hline\end{array}$

Assume the population standard deviation is $\sigma = 34$ and that the population is approximately normal.
Construct a 90% confidence interval for the mean price for all the TI-89's being sold over the
Internet.

• A) (134.6, 147.9)
• B) (122.6, 159.9)
• C) (85.3, 197.2)
• D) (134.2, 148.2)

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Definitions:

Erikson

A developmental psychologist famous for his theory on the psychosocial development of human beings, outlining eight stages from infancy to late adulthood.

Competence

The ability of an individual to do something successfully or efficiently.

Empathy

Ability to put oneself in another person’s place and feel what the other person feels.

Middle Childhood

The developmental stage in children aged approximately 6 to 12 years, typically involving significant growth in cognitive, emotional, and social areas.