HW 6: z-test, t-test for independent samples, t-test for related
samples, 1-way ANOVA
Researchers wanted to...
HW 6: z-test, t-test for independent samples, t-test for related
samples, 1-way ANOVA
Researchers wanted to explore different treatment methods to
effect memory skills in high school freshmen. Subjects were given a
memory test (under multiple conditions) these were the results:
Group 1
10, 8, 9, 11,
8, 9, 7, 6,
9, 8
Group 2
12, 10,
11, 9, 13, 8, 9, 12, 11, 11
Group 3
10, 9, 10, 9, 11,
8, 7, 9, 10, 11...
For the following research question, state an appropriate null
and alternate hypothesis and determine whether the...
For the following research question, state an appropriate null
and alternate hypothesis and determine whether the hypothesis test
would be directional or non-directional and whether it would be a
test of difference, equivalence, superiority, or non-inferiority.
Do students who get at least 8 hours of sleep the night before an
exam get different exam grades than those who get less than 8 hours
of sleep
In the following studies, state whether the one-sample
t test is an appropriate test statistic to...
In the following studies, state whether the one-sample
t test is an appropriate test statistic to analyze data.
If not, then explain why it is not appropriate.
(a) a study testing whether night-shift workers sleep the
recommended 8 hours per day
a one-sample t-test is appropriatea OR
one-sample t-test is not appropriate because a specific
standard or criteria is not identified
(b) a study measuring differences in attitudes about morality
among people who self-identify as liberal or conservative
a one-sample...
With respect to the z test (statistic) and the t test
(statistic), each of the following...
With respect to the z test (statistic) and the t test
(statistic), each of the following are true, except:
1. When using either the z test or the t test, the sampling
distribution should be positively skewed.
2. The z test is appropriate when the parameters of the
population are known.
3. The t test is appropriate when the parameters of the
population are unknown.
4. When using the z test or the t test depends of if μ and...
Directional versus nondirectional hypothesis testing. Cho and
Abe (2013) provided a commentary on the appropriate use...
Directional versus nondirectional hypothesis testing. Cho and
Abe (2013) provided a commentary on the appropriate use of
one-tailed and two-tailed tests in behavioral research. In their
discussion, they outlined the following hypothetical null and
alternative hypotheses to test a research hypothesis that males
self-disclose more than females:
H0: µmales − µfemales ≤ 0
H1: µmales − µfemales > 0
What type of test is set up with these hypotheses, a
directional test or a nondirectional test?
Do these hypotheses encompass...
1). Conduct the appropriate hypothesis test with the following
information, and provide your p-value as your...
1). Conduct the appropriate hypothesis test with the following
information, and provide your p-value as your final
answer. The null hypothesis states that H0:=
250 versus the alternative Ha: > 250. The sample of
size 26 resulted in a mean of 255.0 and a standard deviation of
8.79.
Find the p-value in this example.
2). Conduct the appropriate hypothesis test with the following
information, and provide your p-value as your final
answer. The null hypothesis states that H0: =
0.75 versus the...