Suppose that the age that a child starts to walk can be modeled as a normal random variable with a mean of 13 months and a standard deviation of 1.5...

Suppose that the age that a child starts to walk can be modeled as a normal random variable with a mean of 13 months and a standard deviation of 1.5 months.

a) What is our risk of being wrong if we were to bet that the child would start walking between the ages of 12 and 15 months?

b) Find an age (in months) such that 95% of the children would start walking before this age