Now you want to use Analysis of variance (ANOVA) to carry out a
significance test of...
Now you want to use Analysis of variance (ANOVA) to carry out a
significance test of the null hypothesis. Explain how you would do
this? What would be the p value? Explain how you conclude this?
1. How is an Analysis of Variance (ANOVA) similar to and
different from a t-test for two samples?
2. Why is it impossible to calculate a negative F value when
using an Analysis of Variance to test a hypothesis?
Please answer both questions
One Way ANOVA (Analysis of
Variance)
A manufacturer of steel wants to test the effect of the method
of manufacture on the tensile strength of a particular type of
steel. Four different methods have been tested and the data shown
in Table 1. (Use Minitab)
Develop the ANOVA table and test the hypothesis that methods
affect the strength of the cement. Use a = 0.05
Use the Tukey’s method with a =0.05 to make
comparisons between pairs of means.
Construct...
A researcher conducts an Analysis of Variance (ANOVA) test
looking at the effect of different treatment program options
(therapy, education and reentry services) and finds that drug use
levels vary significantly among between the participants in each of
these three groups. For example, the therapy group had lowest
amount of drug use (mean=2.0), the education group had the highest
(mean=7.0) and the reentry services group was in the middle
(mean=6.0). The researcher follows the steps to conduct an ANOVA
appropropriately....
When we carry out a statistical test with significance level α =
5%, the probability of rejecting the null hypothesis when it is
true is 5%. Suppose that we independently select 5 random samples
of size 100, and for each sample carry out the same statistical
test with significance level 5%. We know that the null hypothesis
is true. What is the probability that we reject the null hypothesis
at most once out of the 5 tests?
Carry out a one-way ANOVA by hand to test the following research
question: Carl wants to know if drinking beer (2, 5 or 8 beers)
affects the number of times people sing karaoke at a
local bar in a given night. He is predicting that the groups will
differ significantly (α = .05). (Perform post-hoc tests if
necessary)
2 beers
5 beers
8 beers
1
2
4
2
1
3
1
3
5
3
2
2
1. Complete the following table:
Nature of Test
Purpose
Example
t-test
Analysis of Variance
(ANOVA)
Correlation
Regression
2. Identify the type of test you would conduct to answer
the following questions:
1. Are compensation packages at firms different for male and
female employees?
2. Is job satisfaction of employees related to organizational
commitment?
3. Is rent approximately equal in the seven emirates of the
UAE?
4. Does stress lead to weight loss?
5. Does job satisfaction influence organizational
commitment?
6....
Practice Exercise 14: One -way Analysis of Variance (ANOVA) Use
the One-way ANOVA function in SPSS to answer the questions based on
the following scenario. Select Descriptives from the Options menu
to obtain the means and standard deviations. (Assume a critical
level of significance of .05). Researchers are interested in
determining if the type of medication influences the number of days
it takes for symptoms to cease. Thirty-six patients are randomly
assigned to receive Brand X, Brand Y, or Brand...
Carry out (show all steps) the test to answer each of these
questions. You may use either the classical method or the P -value
method, but you must state the P -value for each problem.
3. A random sample of 15 households in a small city gives the
following number of hours of television watched in one week. A
marketing firm wishes to determine whether the mean amount of
television watching per week is more than 8 hours at the...
How do you Use and interpret one-way analysis of variance
(ANOVA)? Please provide example(s)
in a research setting, i just want to have an overview
on what a one way analysis of variance is and how it is applied in
an experiment. eg how do i know to use anova in an experiment?