ESS210B
Prof. Jin-Yi Yu
An Example
q
Suppose N = 21 and
r
= 0.8.
Find the 95% confidence limits on
r
.
q
Answer:
(1)
Use Fisher’s Z transformation:
(2)
(2)
(2)
Find the 95% significance limits
q
q
q
(3) Convert Z back to
r
q
q
q
(4) The 95% significance limits are: 0.56 <
r
< 0.92
a handy way to
convert Z back to
r