Question: First steps. While only 5% of babies have learned to walk by the age of 10 months, 75% are walking by 13 months of age.

First steps. While only 5% of babies have learned to walk by the age of 10 months, 75% are walking by 13 months of age. If the age at which babies develop the ability to walk can be described by a Normal model, find the parameters (mean and standard deviation).

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