Question

A study investigated the effects of physical fatigue on the performance of professional tennis players. Researchers measured the number of unforced errors committed by a random sample of 12 professional tennis players during the first three sets of a match. They hypothesized that increased fatigue would be associated with a greater number of errors. The following is an F-table for this hypothetical study using the one-way within-subjects ANOVA. Source of Variation SS df MS Fobt Between groups 11 Between persons 4 Within groups (error) 55 Total (a) Complete the F-table. Source of Variation SS df MS Fobt Between groups 11 Between persons 4 Within groups (error) 55 Total Make a decision to retain or reject the null hypothesis. (Assume alpha equal to 0.05.) Retain the null hypothesis. Reject the null hypothesis. Correct: Your answer is correct. (b) Estimate effect size using partial omega-squared: ωP2. (Round your answer to two decimal places.) ωP2 =

Answer #1

A study investigated the effects of physical fatigue on the
performance of professional tennis players. Researchers measured
the number of unforced errors committed by a random sample of 12
professional tennis players during the first three sets of a match.
They hypothesized that increased fatigue would be associated with a
greater number of errors. The following is an F-table for
this hypothetical study using the one-way within-subjects
ANOVA.
Source of Variation
SS
df
MS
Fobt
Between
groups
15
Between
persons...

A study investigated the effects of physical fatigue on the
performance of professional tennis players. Researchers measured
the number of unforced errors committed by a random sample of 12
professional tennis players during the first three sets of a match.
They hypothesized that increased fatigue would be associated with a
greater number of errors. The following is an F-table for this
hypothetical study using the one-way within-subjects ANOVA. Source
of Variation SS df MS Fobt Between groups 15 Between persons...

A study investigated the effects of physical fatigue on the
performance of professional tennis players. Researchers measured
the number of unforced errors committed by a random sample of 12
professional tennis players during the first three sets of a match.
They hypothesized that increased fatigue would be associated with a
greater number of errors. The following is an F-table for this
hypothetical study using the one-way within-subjects ANOVA. Source
of Variation SS df MS Fobt Between groups 10 Between persons...

A study investigated the effects of physical fatigue on the
performance of professional tennis players. Researchers measured
the number of unforced errors committed by a random sample of 12
professional tennis players during the first three sets of a match.
They hypothesized that increased fatigue would be associated with a
greater number of errors. The following is an F-table for
this hypothetical study using the one-way within-subjects
ANOVA.
Source of variation- SS ,df, MS F
Between
groups
15
Between
persons ...

The following is an incomplete F-table summarizing the
results of a study of the variance of life satisfaction scores
among unemployed, retired, part-time, and full-time employees.
Source of Variation
SS
df
MS
F
Between
groups
17
Within
groups (error)
36
Total
131
(a) Complete the F-table. (Round your values for mean
squares and F to two decimal places.)
Source of Variation
SS
df
MS
F
Between
groups
17
Within
groups (error)
36
Total
131
(b) Compute omega-squared
(ω2).
(Round your...

The following is an incomplete F-table summarizing the
results of a study of the variance of life satisfaction scores
among unemployed, retired, part-time, and full-time employees.
Source of Variation
SS
df
MS
F
Between
groups
20
Within
groups (error)
36
Total
148
(a) Complete the F-table. (Round your values for mean
squares and F to two decimal places.)
Source of Variation
SS
df
MS
F
Between
groups
20
Within
groups (error)
36
Total
148
(b) Compute omega-squared
(ω2).
(Round your...

A psychologist noted that people have more difficulty sleeping
in a bright room than in a dark room. She measured whether the
intensity of the light could predict the time it took a sample of 4
participants to fall asleep. The data for this hypothetical study
are listed in the following table.
Intensity
of
Light (in watts)
Time It
Took to
Sleep (in minutes)
X
Y
5
9
10
19
20
29
40
35
Compute an analysis of regression for...

Retired professional tennis players Martina Navratilova, Monica
Seles, John McEnroe, and Jimmy Connors are all left-handed. Define
the parameter of interest to be the proportion of all professional
tennis players (current and retired) who are left-handed. Only 20%
of the general population is left-handed, but researchers believe
this percent is higher in the population of all professional tennis
players. In a survey of 47 professional tennis players, seven are
left-handed.
Match each vocabulary word with its corresponding description in
this...

In an effort to promote a new product, a marketing firm asks
participants to rate the effectiveness of ads that varied by length
(short, long) and by type of technology (static, dynamic,
interactive). Higher ratings indicated greater effectiveness.
Source of Variation SS df MS F Length 15 Technology Length ×
Technology 154 Error 570 114 Total 869 (a) Complete the F-table and
make a decision to retain or reject the null hypothesis for each
hypothesis test. (Assume experimentwise alpha equal...

Researchers in mental health fields are often interested in
evaluating the effectiveness of using food images to enhance
positive mood. Adapting a typical design from such studies, suppose
we have participants rate their mood change on a standard
self-report affect scale after viewing images of "comfort" foods,
fruits/vegetables (F/V), and random non-food images (used as a
control group). The results are given in the table at right for
this hypothetical study.
Images
Control
F/V
Comfort
Foods
0
0
4
1...

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