Fundamentals of Statistics (5th Edition)
5th Edition
ISBN: 9780134508306
Author: Michael Sullivan III
Publisher: PEARSON
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Textbook Question
Chapter B.4, Problem 6AYU
Poison Ivy Look back at the data in Table 3 on page B-17, which compared the effectiveness of two ointments. Conduct the appropriate test to determine if one ointment has a different effectiveness than the other. Use the α = 0.05 level of significance.
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an attempt to develop a model of wine quality as judged by wine experts, data on alcohol content and wine quality was collected from variants of a particular wine. From a sample of 12wines, a model was created using the percentages of alcohol to predict wine quality. For those data, SR=18,671 and SST=27,382.Use this information to complete parts (a) through (c) below. Please complete part 3(B) ONLY.
Question content area bottom
Part 1
a. Determine the coefficient of determination,
r2,
and interpret its meaning.
r2=0.682
(Round to three decimal places as needed.)
Part 2
Interpret the meaning of r2.
It means that
68.2
of the variation in
wine quality
can be explained by the variation in
alcohol content.
(Round to one decimal place as needed.)
Part 3
b. Determine the standard error of the estimate.
SYX=
(Round to four decimal places as needed.)
The data below are X bar and R values for 25 samples of size n=4 taken from a process filling bags of fertilizer. The measurements are made on the fill weight of the bags in pounds.
Set up the X bar and R charts on this process. Interpret the charts. Does the process seem to be in control? If necessary, assume assignable causes and revise the trial control limits. If the average fill of the bags is to be 50.0 pounds, how does this process compare?
Subgroup Number
X bar
Range
Subgroup Number
X bar
Range
1
50.3
0.73
14
50.8
0.70
2
49.6
0.75
15
50.0
0.65
3
50.8
0.79
16
49.9
0.66
4
50.9
0.74
17
50.4
0.67
5
49.8
0.72
18
50.5
0.68
6
50.5
0.73
19
50.7
0.70
7
50.2
0.71
20
50.2
0.65
8
49.9
0.70
21
49.9
0.60
9
50.0
0.65
22
50.1
0.64
10
50.1
0.67
23
49.5
0.60
11
50.2
0.65
24
50.0
0.62
12
50.5
0.67
25
50.3
0.60…
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Chapter B.4 Solutions
Fundamentals of Statistics (5th Edition)
Ch. B.4 - Skill Building In Problems 1 and 2, test whether...Ch. B.4 - In Problems 1 and 2, test whether the population...Ch. B.4 - NW 3. Hazardous Activities In a survey of 3029...Ch. B.4 - Income Taxes A Gallup organization survey asked...Ch. B.4 - Voice-Recognition Systems Have you ever been...Ch. B.4 - Poison Ivy Look back at the data in Table 3 on...Ch. B.4 - Gun Laws and Capital Punishment The General Social...Ch. B.4 - Children and Childcare The General Social Survey...
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