Suppose the age that children learn to walk is normally distributed with mean 13 months and standard deviation 2 4 month 32

Question

Suppose the age that children learn to walk is normally distributed with mean 13 months and standard deviation 2 4 month 32 randomly selected people were asked what age they learned to walk Round all answers to 4 decimal places where possible a What is the distribution of X X N b What is the distribution of a N c What is the probability that one randomly selected person learned to walk when the person was between 12 5 and 13 4 months old d For the 32 people find the probability that the average age that they learned to walk is between 12 5 and 13 4 months old e For part d is the assumption that the distribution is normal necessary Yes No f Find the IQR for the average first time walking age for groups of 32 people Q1 months Q3 months IQR months

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