Math / Data & Statistics

QuestionAssume the average amount of caffeine consumed daily by adults is normally distributed with a mean of 240 mg and a standard deviation of 46 mg . In a random sample of 300 adults, how many consume at least 320 mg of caffeine daily?
Click here to view page 1 of the standard normal distribution table. Click here to view page 2 of the standard normal distribution table.
Of the 300 adults, approximately $\square$ adults consume at least 320 mg of caffeine daily. (Round to the nearest whole number as needed.)

Studdy Solution
Calculate the number of adults consuming at least 320 mg:
$\text{Number of adults} = 0.0418 \times 300$
$\text{Number of adults} \approx 12.54$
Round to the nearest whole number:
$\boxed{13}$
Of the 300 adults, approximately $\boxed{13}$ adults consume at least 320 mg of caffeine daily.

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