To examine the direction and strength of the relationship between classroom setting and use of AAC, we next calculated point biserial
correlation coefficients for classroom setting and use of AAC for each of the 15 states and for all 15 states combined; Pearson correlation coefficients could not be calculated for these data because AAC use is a binary variable.
and ending with pair of short bristle-like prescutellar hairs.
Acrostichal setae on prescutellar depression biserial
, erect and directed anteriorly.
In addition, biserial
correlation was used to study the relationship between the images and [L.
Finally, a point biserial
correlation was used to determine if a relationship existed between the total power score and adherence.
Among the most informative specimens are groups of co-planar setae with a strict biserial
arrangement of closely spaced setules (Fig.
The tests underwent extensive pre-testing establishing the item difficulty and point biserial
Another typical multiple-choice test item statistic provided by university's testing centers is the point biserial
The major peaks also relate to diversification of the genus Hedbergella and heterohelicids within the study area, which include thin tri-and biserial
heterohelicids (Guembelitria and Heterohelix sp.
correlation coefficients were calculated for the ordinal variables, and phi coefficients were calculated for the binary variables (Khamis, 2008).
In terms of a point biserial
correlation, the relationship between gender and income equaled .
Analysis of the measure, error, standardize fit statistic, and point biserial
correlation variances (via ANOVA) revealed few relationships that could clearly be interpreted as statistically or substantively significant.