The Manager of a Fast Food Restaurant Wants to Determine

question 102

Essay

The manager of a fast food restaurant wants to determine how sales in a given week are related to the number of discount vouchers (#) printed in the local newspaper during the week. The number of vouchers and sales ($000s) from 10 randomly selected weeks is given below with the predicted sales.
Calculate the residuals. $$\begin{array} { | c | c | c | c | } \hline \text { Observation } & \text { Sales } & \text { Predicted Sales } & \text { Residuals } \\\hline 1 & 12.8 & 13.4147 & - 0.6147 \\\hline 2 & 15.4 & 14.8000 & 0.6000 \\\hline 3 & 13.9 & 13.8765 & 0.0235 \\\hline 4 & 11.2 & 12.9529 & - 1.7529 \\\hline 5 & 18.7 & 20.3412 & - 1.6412 \\\hline 6 & 17.9 & 16.1853 & 1.7147 \\\hline 7 & 16.8 & 15.2618 & 1.5382 \\\hline 8 & 15.9 & 14.3382 & 1.5618 \\\hline 9 & 11.5 & 12.9529 & - 1.4529 \\\hline 10 & 13.9 & 13.8765 & 0.0235 \\\hline\end{array}$$ Plot the residuals against the predicted values of y. Does the variance appear to be constant?

Identify the two types of receptors acetylcholine binds to and their responses.

Describe the path and impact of parasympathetic preganglionic axons on various organs.

Recognize cranial nerves that contain parasympathetic axons.

Distinguish between alpha and beta adrenergic receptors and their function.

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Definitions:

Observations

The act of observing something or the data collected during an event or process.

Populations

The entire group of individuals or instances about whom the data is collected or a study is conducted.

Elements

The entities on which data are collected.

Samples

Collections or subsets of data taken from a larger population, used to analyze and make inferences about the population.