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Privitera- Essential Stats for Behavioral Sci. 2/e (Homework)

James Finch

Statistics, section 2, Fall 2019

Instructor: Dr. Friendly

Current Score : 6 / 24

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

Last Saved : n/a Saving...  ()

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Question
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2/2 1/1 3/3 –/4 –/2 –/10 –/2
Total
6/24 (25.0%)

  • Instructions

    Gregory J. Privitera's Essential Statistics for the Behavioral Sciences, second edition, published by SAGE Publications, offers a concise and pedagogically rich introduction to the field of behavioral science statistics. With unique features like SPSS integration, ample application problems, a Making Sense feature to help students work through especially difficult concepts, and an organization driven by learning objectives and learning outcomes, Privitera's supports for student learning are unparalleled. Privitera exposes students to statistical applications in current research, tests their knowledge using current research examples, provides them with step-by-step instructions for using SPSS within the context of current research examples, and engages students by showing them how statistics is important for their generation. Award-winning author Gregory Privitera meticulously prepares the full package of student and instructor support materials that accompany Essential Statistics for the Behavioral Sciences. The Study Guide written to accompany the text offers students the opportunity to deepen their understanding of key concepts and terms, and it provides additional exercise opportunities. For instructors, Privitera provides a test bank that is unrivaled in its depth and accuracy.

    Question 1 highlights word answers such as “class” and “amount” to describe qualitative versus quantitative variables.

    Question 2 includes a graphical summary display for analyzing data.

    Question 3 demonstrates how images can be randomized in addition to the standard practice of randomized numbers for the mean of a sampling distribution.

    Question 4 illustrates questions presented in a collapsible form so that students can focus on working through the problem one part at a time.

    Question 5 features a prompt for “infinity” answers and includes a link to the appropriate statistical table from the appendix so that all of the relevant information is easily accessible.

    Question 6 demonstrates an ANOVA table layout with answer boxes.

    Question 7 allows a student to enter their equation values individually for finding a regression equation. 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.

    The answer key and solutions will display after the first submission for demonstration purposes. Instructors can configure these to display after the due date or after a specified number of submissions.

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. 2/2 points  |  Previous Answers PriviteraEssStat2 1.E.009. My Notes
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2/2
 
A qualitative variable varies by Correct: Your answer is correct. ; a quantitative variable varies by Correct: Your answer is correct. .
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2. 1/1 points  |  Previous Answers PriviteraEssStat2 1.TB.013. My Notes
Question Part
Points
Submissions Used
1
1/1
4/100
Total
1/1
 
Based on the following graphical summary display, what research design was used to record and analyze these data?
    
     Correct: Your answer is correct.
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3. 3/3 points  |  Previous Answers PriviteraEssStat2 6.E.023. My Notes
Question Part
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1/1 1/1 1/1
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3/3
 
A population is normally distributed with a mean of 56 and a standard deviation of 15.
(a) What is the mean of the sampling distribution (μM) for this population?
μM = Correct: Your answer is correct.

(b) If a sample of 25 participants is selected from this population, what is the standard error of the mean (σM)?
σM = Correct: Your answer is correct.

(c) Sketch the shape of this distribution with
M ± 3 SEM.

Correct: Your answer is correct.
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4. –/4 points PriviteraEssStat2 7.E.015. My Notes
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–/4
 
The weight (in pounds) for a population of school-aged children is normally distributed with a mean equal to 122 ± 17 pounds (μ ± σ). Suppose we select a sample of 100 children (n = 100) to test whether children in this population are gaining weight at a 0.05 level of significance.

  • Part (a)

    What are the null and alternative hypotheses?
        


You may need to use the appropriate table in Appendix C to answer this question.
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5. –/2 points PriviteraEssStat2 8.E.015. My Notes
Question Part
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1 2
–/1 –/1
0/100 0/100
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–/2
 
State the total degrees of freedom for the following t-tests. (If you need to use ∞, enter INFINITY.)
(a)
n = 21
 for a one-sample t-test


(b) critical value = 1.645 for a one-tailed test,
α = 0.05



You may need to use the appropriate table in Appendix C to answer this question.
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6. –/10 points PriviteraEssStat2 11.E.506.XP. My Notes
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–/10
 
An educator wants to evaluate four different methods aimed at reducing the time children spend "off task" in the classroom. To test these methods, she implements one method in each of four similar classrooms and records the time spent off task (in minutes) in each classroom. The results are given in the table.
Classroom Method
A B C D
6 2 4 2
0 1 6 4
1 1 5 4
0 1 1 2
2 4 0 5
3 3 5 2
1 5 0 3
4 1 3 4
2 4 4 4
(a) Complete the F-table. (Round your answers to two decimal places.)
Source of
Variation 		SS df MS F
Between
groups
Within
groups (error) 		 
Total    

(b) Is it necessary to compute a post hoc test? Explain. (Assume alpha equal to 0.05.)
    


You may need to use the appropriate table in Appendix C to answer this question.
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7. –/2 points PriviteraEssStat2 13.E.029. My Notes
Question Part
Points
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1 2
–/1 –/1
0/100 0/100
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–/2
 
An instructor measured quiz scores and the number of hours studying among a sample of 20 college students. If
SSXY = 49,
SSX = 99,
MY = 6,
 and
MX = 5,
 then what is the regression equation for this sample? (Round your numerical values to three decimal places.)
Y hat = X +
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