Question

Suppose the age that children learn to walk is normally distributed with mean 11 months and standard deviation 1.1 month. 14 randomly selected people were asked what age they learned to walk. Round all answers to 4 decimal places where possible.

1. What is the probability that one randomly selected person learned to walk when the person was between 9.5 and 12.5 months old?
2. For the 14 people, find the probability that the average age that they learned to walk is between 9.5 and 12.5 months old.
3. Find the IQR for the average first time walking age for groups of 14 people.
   Q1 = months
   Q3 =  months
   IQR: months

Answer 1