EXAMPLE 1.36 Find the Proportion from z
What proportion of observations on a standard Normal variable take values less than ?
To find the area to the left of 1.47, locate 1.4 in the left-hand column of Table A, then locate the remaining digit 7 as 0.07 in the top row. The entry opposite 1.4 and under 0.07 is 0.9292. This is the cumulative proportion we seek. Figure 1.26 illustrates this area.
Figure 1.28: FIGURE 1.26 The area under the standard Normal curve to the left of the point is 0.9292, for Example 1.36.