A recent report indicates that the reading speeds for adults with a college degree follow a normal distribution with a mean of 200 words per minute and a standard deviation of 42 words per minute.

Suppose we plan on taking a random sample of 40 adults. Which model would we use to find the probability that the resulting sample mean reading speed is at most 208 words per minute?

Normal (200, 42)

Normal (40, 0.50)

Normal (200, 6.6408)

Binomial (200, 42)

Binomial (40, 0.50)

Binomial (200, 6.6408)