Page 52 - Basic Statistics

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Worked Solution:

Figure 3.7 P ( -2.4 < Z < -0.8 )

 -8 20 16 - 20 
a. P ( 8 < X < 16 ) =  P  Z  
 5 5 
= P (-2.4 < Z < -0.8 )

= P (0.8 < Z < 2.4 )

= P ( 0 < Z < 2.4 ) - P ( 0 < Z < 0.8 )

= 0.4918 – 0.2881 = 0.2037

Figure 3.8 P ( Z < -1.6 )

~~* CHAPTER 3 NORMAL PROBABILITY DISTRIBUTION *~~