Answer:
3.8% , unusual
Step-by-step explanation:
We have that the mean is 175 degrees (m) and the standard deviation is 6.2 degrees (sd), so we are asked:
P (x <164)
P ((x - m) / sd <(164 -175) /6.2)
P (z <- 1.77)
If we look in the normal distribution table we have to:
P (x <164) = 0.0384
That is, the probability is 3.8%
Unusual is when the probability is less than 5%, that is to say in this case if it can be said that an unusual data.
