SCENARIO 12-11
a Computer Software Developer Would Like to Use

question 132

True/False

SCENARIO 12-11
A computer software developer would like to use the number of downloads (in thousands) for the trial version of his new shareware to predict the amount of revenue (in thousands of dollars) he can make on the full version of the new shareware.Following is the output from a simple linear regression
along with the residual plot and normal probability plot obtained from a data set of 30 different sharewares that he has developed:
$\begin{array}{lr}{\text { Regression Statistics }} \\\hline \text { Multiple R } & 0.8691 \\\hline \text { R Square } & 0.7554 \\\hline \text { Adjusted R Square } & 0.7467 \\\hline \text { Standard Error } & 44.4765 \\\hline \text { Observations } & 30.0000 \\\hline\end{array}$

$\text { ANOVA }$
$\begin{array}{|l|r|r|r|r|r|}\hline &\text { df } & \text { SS } & \text { MS } & F & \text { Significance } F \\ \hline \text { Regression } & 1 & 171062.9193 & 171062.9193 & 86.4759 & 0.0000 \\\hline \text { Residual } & 28 & 55388.4309 & 1978.1582 & & \\\hline \text { Total } & 29 & 226451.3503 & & \\\hline\end{array}$





Simple Linear Regression 12-41
-Referring to Scenario 12-11, the null hypothesis for testing whether there is a linear relationship between revenue and the number of downloads is "There is no linear relationship between revenue and the number of downloads".

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Definitions:

α-Bromination

The addition of a bromine atom to the alpha position of a carbonyl compound in organic chemistry, often used in synthesis reactions.

Nucleophile

An atom or molecule that donates an electron pair to an electrophile to form a chemical bond in reaction mechanisms.

Major Organic Product

The primary organic compound produced in the highest quantity in a chemical reaction.

Enamine

A compound containing a nitrogen atom connected to a carbon atom that is part of a double bond, resulting from the reaction between a secondary amine and an aldehyde or ketone.