12. Comparing ANOVA and the t test for an
independent-measures hypothesis test
Suzanne Zeedyk, a developmental psychologist at Dundee
University’s School of Psychology, conducted a pilot study in which
parents started a half-hour walk with their infants in a
parent-facing or an away-facing stroller and then switched to the
other type of stroller midway. Her results suggest that parents
talked less to the babies, the babies had higher heart rates, and
they were less likely to fall asleep in away-facing...
What is the best description of a hypothesis test?
Select one:
a. A tool for comparing population parameters inferred from
samples
b. Dissecting the data
c. Help in solving problems
d. Breaking up the problem
Which hypothesis test is similar to the 1 sample t-test but is
used when the data set is non-normal?
Select one:
a. 1- sample sign
b. Kruskal-Wallis
c. Friedman
d. Mann-Whitney
Which statements is correct about the Capability Analysis
shown?
Select one:
a. From this...
Test a hypothesis using variables in the data set for which
ANOVA is the appropriate test (do NOT use the variables assigned
for the final project).
Data:
Gender abuse
female 7.00
female .00
female 7.00
male 7.00
male .00
male 7.00
female 7.00
female 7.00
female .00
female .00
State the null and research hypotheses in statistical terms,
including the appropriate notation.
Explain why ANOVA is the appropriate test. In your explanation,
describe the formula (13.1) for the statistic...
You will perform an ANOVA test. For the
hypothesis test make sure to report the following steps:
Identify the null hypothesis, Ho, and the alternative
hypothesis, Ha.
Determine whether the hypothesis test is left-tailed,
right-tailed, or two-tailed.
Find the critical value(s) and identify the rejection
region(s).
Find the appropriate standardized test statistic. If
convenient, use technology.
Decide whether to reject or fail to reject the null
hypothesis.
Interpret the decision in the context of the original
claim.
The grade point...
The null hypothesis for an ANOVA analysis comparing four
treatment means is rejected. The four sample means are = 10,
= 12, = 15, = 18. The sample size for each treatment
is the same. If ( - ) is significantly different from zero, then
________.
You will perform a Chi-Square test and an
ANOVA test. For each hypothesis test make sure to
report the following steps:
Identify the null hypothesis, Ho, and the alternative
hypothesis, Ha.
Determine whether the hypothesis test is left-tailed,
right-tailed, or two-tailed.
Find the critical value(s) and identify the rejection
region(s).
Find the appropriate standardized test statistic. If convenient,
use technology.
Decide whether to reject or fail to reject the null
hypothesis.
Interpret the decision in the context of the original...
Given the other statistical tests discussed so far, like ANOVA, t
test, and hypothesis test, what strengths does linear regression
provide that the other tests do not? Identify a peer-reviewed study
that uses linear regression in its analysis. Explain why linear
regression was used and discuss one challenge in interpreting the
results.
hypothesis statements using symbols for
Two sided hypothesis test for the mean
One sided hypothesis test for the mean
Two sided hypothesis test for variance
One sided hypothesis test for variance
Explain what each symbol you used above stands for
In ANOVA test, acceptance of the null hypothesis
indicates that:
The slope of the SLR model is null
True
b)
False
A manufacturer produces ball bearings, normally
distributed, with unknown mean and standard deviation. A sample of
25 has a mean of 2.5cm. The 99% confidence interval has length 4cm
(double-sided).
Which statement is correct (use t-distribution):
s2 = 23.42cm2
b) s2 =
12.82cm2
c) s=
3.58cm
d) s=
4.84cm
The 99% prediction interval measures (use...