You might need: Calculator,Z table

Problem

A set of average city temperatures in December are normally distributed with a mean of 16, point, 3, degree, C and a standard deviation of 2, degree, C.
What proportion of temperatures are between 12, point, 9, degree, C and 14, point, 9, degree, C?
Give your answer correct to four decimal places.
  • Your answer should be
  • an integer, like 6
  • a simplified proper fraction, like 3, slash, 5
  • a simplified improper fraction, like 7, slash, 4
  • a mixed number, like 1, space, 3, slash, 4
  • an exact decimal, like 0, point, 75
  • a multiple of pi, like 12, space, p, i or 2, slash, 3, space, p, i
Do 4 problems