2. Find the z-score using the left and top headings of each row and column. The number where the values meet represents the shaded area under the curve (to the left). If the shaded area is to the right, subtract the value from one.

3. EXAMPLE #1  A survey indicates that people use their computers an average of 2.4 years before upgrading to a new machine. The standard deviation is 0.5 years. A computer owner is selected at random. Find the probability that he or she will use it for less than 2 years before upgrading.

4. EXAMPLE #2  A Ford Focus manual transmission gets an average of 27 mpg in city driving with a standard deviation of 1.6 mpg. A Focus is selected at random. What is the probability that it will get more than 31 mpg?

5. EXAMPLE #3  A survey indicates that for each trip to the supermarket a shopper spends an average of 45 minutes with a standard deviation of 12 minutes. Find the probability that the shopper will be in the store between 24 and 54 minutes.

6. Group Work #5  1.To the left of z = -0.84.  2.To the left of z = 1.26.  3.To the right of z = 1.68.  4.To the right of z = -0.83.  5.Between z = -1.64 and the mean.  6.Between z = 0.15 and z = 1.35.  7.To the left of z = -0.15 and to the right of z = 1.5.  8.To the left of z = 0.12 and to the right of z =1.72. Use the Standard Normal Table to find the indicated area under the curve.