TABLE 15-3
a Certain Type of Rare Gem Serves as a Status

question 14

True/False

TABLE 15-3
A certain type of rare gem serves as a status symbol for many of its owners. In theory, for low prices, the demand increases and it decreases as the price of the gem increases. However, experts hypothesize that when the gem is valued at very high prices, the demand increases with price due to the status owners believe they gain in obtaining the gem. Thus, the model proposed to best explain the demand for the gem by its price is the quadratic model:

$Y=\beta_{0}+\beta_{1} X+\beta_{2} X^{2}+\varepsilon$

where Y = demand (in thousands) and X = retail price per carat.
This model was fit to data collected for a sample of 12 rare gems of this type. A portion of the computer analysis obtained from Microsoft Excel is shown below:
SUMMARY OUTPUT
$\begin{array}{lc}\text { Regression Statistics}\\\hline\text { Multiple R } & 0.994 \\\text { R Square } & 0.988 \\\text { Standard Error } & 12.42 \\\text { Observations } & 12 \\\hline\end{array}$

$ANOVA$
$\begin{array}{lrrrrc}\hline & d f & S S & \text { MS } & F & \text { Signifcance } \\\hline \text { Regression } & 2 & 115145 & 57573 & 373 & 0.0001 \\\text { Residual } & 9 & 1388 & 154 & & \\\text { Total } & 11 & 116533 & & & \\\hline\end{array}$


$\begin{array}{lrccc}\hline & \text { Coeff } & \text { Std Error } & t \text { Stat } & \text { p-value } \\\hline \text { Intercept } & 286.42 & 9.66 & 29.64 & 0.0001 \\\text { Price } & -0.31 & 0.06 & -5.14 & 0.0006 \\\text { Price Sq } & 0.000067 & 0.00007 & 0.95 & 0.3647\end{array}$

-Referring to Table 15-3, a more parsimonious simple linear model is likely to be statistically superior to the fitted curvilinear for predicting sale price (Y).

Describe the ABC acronym and its application in understanding behavior chains within the context of nutrition counseling.

Identify best practices in providing education during nutrition counseling sessions.

Identify the major predictors of relapse, overeating, and dysfunctional eating patterns.

Understand the role and strategies of stress management in dietary behavior change.

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Definitions:

Signal Detection Theory

A means to quantify the ability to discern between information-bearing patterns and random patterns that distract from the information.

Response Bias

A wide range of cognitive biases that influence the responses of participants away from an accurate or truthful response.

Sensory Adaptation

The diminished sensitivity to a stimulus as a consequence of constant exposure to that stimulus.

Sensory Threshold

The minimum level of stimulus intensity required for a sensory system to detect a stimulus.