82. Water! A blogger claims that U. S. adults drink an average of five 8-ounce glasses of water per day.
Skeptical researchers ask a random sample of 24
U. S. adults about their daily water intake. A graph of
the data shows a roughly symmetric shape with no
outliers. The figure below displays Minitab output
for a one-sample t interval for the population mean.
Is there convincing evidence at the 10% significance
level that the blogger's claim is incorrect? Justify your
answer.
Session