Answer:
C) 28
Step-by-step explanation:
The Central Limit Theorem estabilishes that, for a random variable X, with mean [tex]\mu[/tex] and standard deviation [tex]\sigma[/tex], the sample means with size n of at least 30 can be approximated to a normal distribution with mean [tex]\mu[/tex] and standard deviation [tex]s = \frac{\sigma}{\sqrt{n}}[/tex]
Over the entire six years that students attend an Ohio elementary school, they are absent, on average, 28 days due to influenza.
By the Central Limit Theorem, the expected value is 28.
So the correct answer is:
C) 28
