Business Statistics

Chapter 7 | Continuous Probability Distributions 241

FIGURE 7.29(b)

Corresponding z scores

for probability of randomly

receiving a score between 80

and 110

FIGURE 7.30

MS Excel sheet showing

the calculation of normal

probabilities for Example 7.3

200. If we want to calculate P(x > 200) as shown in Figure 7.30, this total area

under P(x > 200) (from the left), which is calculated as 0.945200708, must be

deducted from the total area under normal curve, that is, 1. This is also shown in

the Figures 7.25(a) and 7.25(b) (for Example 7.3). The same concept may be used

for calculating all other probabilities. Figures 7.30 is the MS Excel worksheet ...