An analyst for an association of domestic coffee distributors wishes to test the proportion of coffee drinkers who would drink a newly decaffeinated blend of coffee. A break even analysis indicates that the launch of this product would be successful only if the beverage is preferred by more than 20% of the market, otherwise the company will face significant financial losses. In a random sample of n = 1000 coffee drinkers, it was found that 187 indicated they would drink the new blend. Whats the test statistic?