1a) True or False? John uses two independent samples to
construct a 95 percent confidence interval for the difference of
two population means as [1.08, 5.32], where the two unknown
population variances are assumed equal. This confidence interval
implies he should reject the null hypothesis of equal
population means in a two-sample two-tailed t test
with α = 0.05, using the same samples and
assuming equal variances.
Select one:
True
False
1b) A paired t-test
uses two columns of data. If in either column there are 11
observations, the degrees of freedom for the test statistic is
Select one:
A. 9
B. 20
C. 22
D. 10
1c) True or False? In setting up a statistical test
to compare two population proportions, we should always set a
nonzero value for the hypothesized difference
D0 when stating the null and alternative
hypotheses.
Select one:
True
False