VALIDATION OF MEASURING INSTRUMENTS 183
2g %
of :
Ez I
oS L
58 BS ar. je
80)
i >" 82 |
1-2 |
2
¢ o 35 i
a =1
31 4,20}
C2 2r 38 |
156.46 |
a 227.04
Mx=5.27
2 fd? 227.0
«37 | 30 | a
| o N 57 1.84
M. JM, z=.3958 (from Table I, opposite p = .45)
6.27 | +03 | ss (M,—M)p 2
03
a bh
=" | (2.24).2475 _
55 | 45 1.84 - .3958 7
Figure 22: Illustrating the computation of biserial r.

. i