1) a)The maximum July temperature (which is normally distributed) in Death Valley, CA, has a mean of 51.0 and standard deviation of 1.72. What is the probability that the maximum July temperature will not exceed 50.0 in a given year?

b)What is the probability the temperature will reach 53 in a given year?

c)What is the probability that the maximum July temperature will fall between 51 and 52?

2)Given a normally distributed population with = 10 and = 2, what value does X have to be so that 80% of the distribution lies below that value?

3)If the age distribution of children in grade 5 is normal with = 10 and = 2, what proportion of the children are less than 8 years old or greater than 12 years old