Suppose the age that children learn to walk is normally distributed with a mean 11 months and standard deviation 2.2 month. 35 randomly selected people were asked what age they learned to walk. What...

Suppose the age that  children learn to walk is normally distributed with a mean 11 months and standard deviation 2.2 month. 35 randomly selected people were asked what age they learned to walk.

What is the probability that one randomly selected person learned to walk when the person was between 10.8 and 11.1 months old?

For the 35 people find the probability that the average age that they learned to walk is between 10.8 and 11.13 months old?

Find the IQR for the average first time walking age for groups of 35 people.  For part d, is the assumption that the distribution is normal necessary?  Yes or No

Q1 = how many months

Q3 = how many months

IQR = how many months