Question

1.   The central task of determining _________ is the establishment of confidence limits and the testing of hypotheses about the data.
a.   independence
b.   variance
c.   variability
d.   validity

Answer 1

The central task of determining variance is the establishment of confidence limits and the testing of hypotheses about the data.

Because, for confidence limits and testing of hypotheses we need an value of an variance of the data.