how do i find this answer

Question

During September, the average temperature of Laurel Lake is 64.2° and the standard deviation is 3.2°. Assume the variable is normally distributed. For a randomly selected day in September, find the probability that the temperature will be above 65°. Give your answer rounded to four decimal places (to the nearest ten-thousandth).

Answer 1

µ = 64.2

 

Standard deviation = 3.2

 

Z= (65 - 64.2)/3.2 = 0.25

 

Area from tables = 0.0987

 

Probability = 0.0987