A Research Project Was Conducted to Study the Effect of a Chemical

question 30

Multiple Choice

A research project was conducted to study the effect of a chemical on undesired insects.The researcher uses 6 dose levels, and at each level exposes 250 insects to the chemical and proceeds to count the number of insects that die.The researcher uses a binary logistic regression model to estimate the probability of death as a function of dose. Shown below is Minitab output from a logistic regression.
$$\begin{array} { l c c c r r r } \text { Coefficients } \\& & & & & \\\text { Term } & \text { Coef } & \text { SE Coef } & 95 \% \text { CI } & \text { Z-Value } & \text { P-Value } & \text { VIF } \\\text { Constant } &- 2.644 & 0.156 & ( - 2.950 , - 2.338 ) & - 16.94 & 0.000 & \\\text { Dose } & 0.6740 & 0.0391 & ( 0.5973,0.7506 ) & 17.23 & 0.000 & 1.00 \\& & & &\end{array}$$

$\begin{array}{l}\text { Odd Ratios for Continuous Predictors } \\\text { Odds Ratio } \quad \quad 95 \% \mathrm{CI} \\\text { Dose } \quad 1.9621 \quad(1.8173,2.1184) \end{array}$

The predicted probability that an insect will die when exposed to the first dose is ____.

• A)0.0814
• B)0.1046
• C)0.1153
• D)0.1224
• E)0.1395

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Definitions:

Autonomic Arousal

The activation of the autonomic nervous system, leading to physiological changes such as increased heart rate, sweating, or rapid breathing.

Emotional Experience

The complex state of feeling that results from the interaction of subjective and physiological factors.

James-Lange Theory

A theory of emotion that suggests physical arousal precedes and causes emotional experience.

Cannon-Bard Theory

A theory of emotion that argues that physiological arousal and emotional experience occur simultaneously, yet independently.