Question

Assume the average amount of caffeine consumed daily by adults is normally distributed with a mean of 250 mg and a standard deviation of 46 mg. In a random sample of 300 adults, how many consume at least 310 mg of caffeine dally?Click here to view page 1 of the standard normal distribution tableClick here to view page 2 of the standard normal distribution tabloof the 300 adults, approximately adults consume at least 310 mg of caffeine daily(Round to the nearest whole number as needed.)

Answer 1

`\begin{gathered} P(X>310)=P(Z>1.30)=0.0961 \\ \end{gathered}`

so we have that the amount of adults that consume at least 310mg is

`300\cdot0.0961=28.83\approx29`