Number of Fish Tanks The following data give the number of fish tanks owned for a population of 4 families. 
{Number of Fish Tanks Narrative} A sample of size 2 is drawn at random from the population. Use the formulas 
and 
to calculate the mean and the standard deviation of the sampling distribution of the sample means.
Definitions:
Loyalty Program
A rewards program offered by a company to customers who frequently make purchases to encourage continuous buying.
Sweepstakes
A promotional drawing in which prizes are given away at no charge to the participants.
Contest
A competition where individuals or groups participate to win a prize or recognition by meeting or surpassing a specific challenge.
In-Store Displays
Promotional fixtures or arrangements in retail environments designed to attract customer attention and encourage purchases.
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