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Suppose the age that children learn to walk is normally distributed with mean 12 months and standard deviation 1 month. 13 randomly selected people were
Suppose the age that children learn to walk is normally distributed with mean 12 months and standard deviation 1 month. 13 randomly selected people were asked what age they learned to walk. Round all answers to 4 decimal places where possible.
- What is the distribution ofXX?XX~ N(,)
- What is the distribution ofxx?xx~ N(,)
- What is the probability that one randomly selected person learned to walk when the person was between 10.5 and 12.5 months old?
- For the 13 people, find the probability that the average age that they learned to walk is between 10.5 and 12.5 months old.
- For part d), is the assumption that the distribution is normal necessary?YesNo
- Find the IQR for the average first time walking age for groups of 13 people.
- Q1 =months
- Q3 =months
- IQR:months
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