Coffee: A Study on the Number of Cups Consumed by U.S. Adults
A researcher claims that the number of cups of coffee U.S. adults drink per day is distributed as shown in the figure. You randomly select 1600 U.S. adults and ask them how many cups of coffee they drink each day. The table below shows the results. At a significance level of α = 0.05, test the researcher's claim. How many cups of coffee do you drink per day?
Survey Results:
Response Frequency, f
0 cups 570
1 cup 432
2 cups 282
3 cups 152
4 or more cups 164
About 64% of Americans drink at least 1 cup per day.