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Johnson & Kuby - STAT 1/e (Homework)

James Finch

Statistics, section 2, Fall 2019

Instructor: Dr. Friendly

Current Score : 11 / 22

Due : Sunday, January 27, 2030 23:30 EST

Last Saved : n/a Saving...  ()

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11/22 (50.0%)

  • Instructions

    Create your course assignments by selecting questions from our bank of end-of-section exercises.

    In this assignment we present several textbook question types found in STAT 1/e by Robert Johnson and Patricia Kuby, published by Brooks/Cole. This demo assignment allows many submissions and allows you to try another version of the same question for practice wherever the problem has randomized values.

Assignment Submission

For this assignment, you submit answers by question parts. The number of submissions remaining for each question part only changes if you submit or change the answer.

Assignment Scoring

Your last submission is used for your score.

1. –/5 points JKEStatS1 12.E.005. My Notes
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Refer to the following ANOVA table and find the missing values. (Give your answers correct to two decimal places.)
Source df SS MS F
Factor 3
Error 44.6
Total 20 169.2


You may need to use the appropriate table in Appendix B to answer this question.
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2. –/1 points JKEStatS1 12.E.008. My Notes
Question Part
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–/1
 
Consider the following table for a single-factor ANOVA.
Level of Factor
Replicates123
1137
2147
3344
(a) Find x1,2.


(b) Find x2,1.


(c) Find C1.


(d) Find x.


(e) Find (Ci )2.


You may need to use the appropriate table in Appendix B to answer this question.
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3. –/6 points JKEStatS1 12.E.011. My Notes
Question Part
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Submissions Used
1 2 3 4 5 6
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–/6
 
Consider the following. (Give your answer bounds exactly.)
(a) Find the p-value for F = 3.5, df(factor) = 3, df(error) = 21.
< p <

(b) Find the p-value for F = 4.19, df(factor) = 3, df(error) = 17.
< p <

(c) Find the p-value for F = 4.54, df(factor) = 5, df(error) = 16.
< p <


You may need to use the appropriate table in Appendix B to answer this question.
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4. –/3 points JKEStatS1 12.E.015. My Notes
Question Part
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Submissions Used
1 2 3
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–/3
 
Suppose that an F test (as described in this chapter using the classical approach) has a critical value of 2.2, as shown in this figure.
(a) What is the interpretation of a calculated value of F larger than 2.2?
    

(b) What is the interpretation of a calculated value of F smaller than 2.2?
    

(c) What is the interpretation if the calculated F were 0.1? 0.01?
    


You may need to use the appropriate table in Appendix B to answer this question.
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5. –/4 points JKEStatS1 12.E.019. My Notes
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–/4
 
A study compared different methods of reducing blood pressure. Biofeedback (n = 13 subjects), biofeedback/relaxation (n = 14), and relaxation (n = 15) were the three methods compared. There were no differences among the three groups on pretest diastolic or systolic blood pressure readings. There was a significant posttest difference between groups on the systolic measure, F = 4.13, and diastolic measure, F = 5.46.
(a) Find the df values.
df(method) =
df(error) =

(b) Use Tables 9A, 9B, and 9C in Appendix B to find the p-values for the systolic and diastolic measures.
systolic: p <
diastolic: p <


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6. –/3 points JKEStatS1 12.E.028. My Notes
Question Part
Points
Submissions Used
1 2 3
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–/3
 
A study was conducted to assess the effectiveness of treating vertigo (motion sickness) with the transdermal therapeutic system (TTS; a patch worn on the skin). Two other treatments, both oral (one pill containing a drug and one a placebo), were used. The age and the gender of the patients for each treatment are listed here.
TTS Antivert Placebo
47-f 53-m 51-f 43-f 67-f 38-m
41-f 58-f 53-f 56-f 52-m 59-m
63-m 62-f 27-m 48-m 47-m 33-f
59-f 34-f 29-f 52-f 35-f 32-f
62-f 47-f 31-f 19-f 37-f 26-f
24-m 35-f 25-f 31-f 40-f 37-m
43-m 34-f 52-f 48-f 31-f 49-f
20-m 63-m 55-f 53-m 45-f 49-m
55-f 46-f 32-f 63-m 41-f 38-f
51-f 54-m 49-m
21-f
Is there a significant difference between the mean age of the three test groups? Use α = 0.05. Use a computer or calculator to complete this problem.

Find the test statistic. (Give your answer correct to two decimal places.)


Find the p-value.

State the appropriate conclusion.
    


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