Consider the following to answer the question(s) below:
A sales manager was interested in determining if there is a relationship between college GPA and sales performance among salespeople hired within the last year. A sample of recently hired salespeople was selected and the number of units each sold last month was recorded. Relevant data appear in the table below.
Below are the scatterplot, regression results, and residual plots for these data. 
-Write the null and alternative hypothesis.
Definitions:
Micro Market
A small, specific segment of a market with its own particular needs or preferences.
Trial Market
A test marketing strategy where new products are introduced in a limited area to gauge consumer response before a full-scale launch.
Marketing Mix
The controllable factors—product, price, promotion, and place—that can be used by the marketing manager to solve a marketing problem.
Independent Variables
Variables in an experiment or study that are manipulated or changed to study their effects on dependent variables.
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