A sales manager for an advertising agency believes that there is a relationship between the number of contacts that a sales person makes and the amount of the sales dollars earned. A regression analysis shows the following results: 
What is the standard error of the slope?
Definitions:
Divorce Rate
The statistical measure of the number of divorces occurring among the population within a given time period.
Remarriages
The act of marrying again after being divorced or widowed.
First Marriages
The initial marital union of an individual, marking their first formal commitment through marriage.
Second Marriages
Marriages that occur after one or both partners have been previously married, often involving complex emotional and logistical considerations.
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