Assignment:
If a drive to work each morning is µ = 38 mins with a σ = 5 mins, on a randomly selected morning what is the probability that the drive will take between 36 and 40 mins?
IQ scores form a normal distribution with µ = 100 and σ = 15. Individuals with IQs above 140 are classified in the genius category. What proportion of the population consists of geniuses? Individuals between 90 and 110 are classified as average. What is the proportion of the population that is classified as average?
Provide complete and step by step solution for the question and show calculations and use formulas.