A Professor Was Interested in Determining Whether the Prices of New

question 2

Multiple Choice

A professor was interested in determining whether the prices of new textbooks in
The bookstore were higher than if purchased online. She selected 6 textbooks and priced
Each at the bookstore and online.
Paired T-Test and CI: Bookstore, Online Paired $\mathrm{T}$ for Bookstore - online

$\begin{array}{lrrrr} & \text { N } & \text { Mean } & \text { StDev } & \text { SE Mean } \\ \text { Bookstore } & 6 & 115.00 & 22.36 & 9.13 \\ \text { Online } & 6 & 105.83 & 13.20 & 5.39 \\ \text { Difference } & 6 & 9.17 & 13.20 & 5.39\end{array}$

95\% lower bound for mean difference: -1.69
T-Test of mean difference $=0(\mathrm{vs}>0) : \mathrm{T}$ -Value $=1.70 \quad$ P-Value $=0.075$

Based on her analysis, we can conclude at the .05 level of significance that

• A) The prices are the same in the bookstore and online.
• B) The prices are higher in the bookstore.
• C) The prices are higher online.
• D) The prices are different in the bookstore and online.
• E) The analysis is not conclusive.

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Definitions:

Figure-ground Segregation

A principle in perceptual organization where the visual field is divided into objects (the figures) that stand out from their surroundings (the ground).

Orienting Responses

Involuntary physiological reactions to novel or significant stimuli, such as turning the head towards the source.

Top-down Processing

A cognitive process that starts with the analysis of high-level cognitive functions, such as prior knowledge and expectations, before processing specific details.

Induced Motion

A perceptual phenomenon where motion is incorrectly perceived in a stationary object because of the motion of a surrounding framework or context.