We have five groups and three observations per group. The group
means are 6.5, 4.5, 5.7,...
We have five groups and three observations per group. The group
means are 6.5, 4.5, 5.7, 5.7, and 5.1, and the mean square for
error is .75. Compute an ANOVA table for these data.
Solutions
Expert Solution
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Note: Test of Hypothesis
Null hypothesis: Population means are same.
H0:
against H1: At least two of the means
are different.
ANOVA
Part 1—A study compared five groups with six observations per
group. An F statistic of 5.13 was reported.
A.) Give the degrees of freedom for this statistic and be
specific about which part you are referencing, numerator or
denominator.
B.) Find the P-value associated with this F-statistic. Show your
calculator command in the space provided.
Part 2—A study to compare four groups took random samples from
each population of interest of sizes 38, 42, 21, and 45. The
corresponding...
Small Group Discussion (Class will be divided into
Groups of up to 5 students)
We have made the point that managers often attempt to maximize
the contribution margin per unit of a particular resource that
limits output capacity. The following are five familiar types of
businesses:
Small medical or dental practice
Restaurants
Supermarket.
Builder of residential housing.
Auto dealer’s service department.
Instructions:
Within a group of students:
Each student will be assigned one of the five familiar types of
businesses...
Small Group Discussion (Class will be divided into
Groups of up to 5 students)
We have made the point that managers often attempt to maximize
the contribution margin per unit of a particular resource that
limits output capacity. The following are five familiar types of
businesses:
Small medical or dental practice
Restaurants
Supermarket.
Builder of residential housing.
Auto dealer’s service department.
Instructions:
Within a group of students:
Each student will be assigned one of the five familiar types of
businesses...
For an experiment with one factor containing 7 groups, with 8
observations in each group, fill in the missing results in the
following ANOVA table.
Source
df
SS
MS
F
Among Groups
63
Within Groups
10
Please provide the explanation for each blanks
A researcher records the following data for each of three
groups.
Group
A
Group
B
Group
C
5
4
4
6
12
14
16
12
10
11
15
9
12
7
13
What is the value of the F-statistic? (Round your
answer to two decimal places.)
F = __________________
Explain your answer.
F is the indicated value because the groups means are different.
There is substantial variability between groups.
F is the indicated value because the group means are the...
Need to construct ANOVA table in R using the below
information
We have five groups and three observations per group. The group
means Exercise 3.4 are 6.5, 4.5, 5.7, 5.7, and 5.1, and the mean
square for error is .75. Compute an ANOVA table using R for these
data
A shoe company wants to test if three groups of workers have
different salaries.
Group (1): 23, 41, 54, 66, 78
Group (2): 45, 55, 60, 70, 72
Group (3): 18, 30, 34, 40, 44
Use kruskall Wallis test with α = 0.05.
Assume that a researcher is intending to compare the means of
three different treatment groups. The researcher is concerned about
the fact that multiple comparisons will be made during the analysis
phase. A) What is the probability that the researcher will reject
at least one true hypothesis in his study? B) Assume the researcher
is going to compare the means of four different treatment groups.
What is the probability that the researcher will reject at least
one true hypothesis in...
Suppose there is a random sample of 200 observations, divided
into three groups. The table below summarizes the count of
observations that were seen in each group.
Group 1
Group 2
Group 3
102
40
58
We are interested in testing the null hypothesis
H0:p1=0.5,p2=0.2,p3=0.3, against the alternative hypothesis
HA:Atleastoneproportionisincorrect.
a) What is the value of the test statistic?
Round your response to at least 2 decimal places.
b) What conclusion can be made at the 5% level of...
Suppose we collected three groups of exam scores: each group has
10 persons, the exam average score within each group is 15, 20, 25
respectively, and the sample standard deviation within each group
is always 5. Using ANOVA and F-test, compute the p-value for
testing H0 : miu1 = miu2 = miu3 for the three groups