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.

Transcribed Image Text:

X < D Session One-Sample T: Water intake (oz) Variable N Mean StDev SE Mean 0.240 90% CI (3.794, 4.615) Water intake (oz) 24 4.204 1.173