Statistical Calculations 135
Example 3
The variable Z is a standard normal random variable. Find
z
so that the probability that Z is
less than
z
and greater than -
z
is equal to 0.95.
Figure 19
The given area is 0.95. The area not included is 1-0.95/2 = 0.025. Since the normal
distribution is symmetrical, half of the desired area is in the lower tail, .05/2=.025. The
desired area corresponds to a lower tail probability of .025.
Table 12-25 Example converting from lower tail (the inner area)
Keys
Display
Description
7:GV]oF
-1.959964
Returns desired value of
z
.
Summary of Contents for 10bII+
Page 1: ...i HP 10bII Financial Calculator User s Guide HP Part Number NW239 90001 Edition 1 May 2010 ...
Page 3: ...iii HP 10bII Financial Calculator ...
Page 30: ...At a Glance 22 ...
Page 144: ...Statistical Calculations 136 ...
Page 183: ...Warranty Regulatory and Contact Information 9 ...
Page 184: ...Warranty Regulatory and Contact Information 10 ...