Please use the following information to answer questions 43-46: A professor randomly selects a sample of 16 students to attend additional statistics tutoring sessions for the duration of the course. At the end of the semester, the students take a nationally standardized test of statistics knowledge. Their scores average 26 with SS = 960. The population mean on that normally distributed test is μ = 20. Do the data support the conclusion that the tutoring has a significant effect? Use α = .05 and show all 5 steps. If significant, how large is the effect?    Question 43: Based on the calculated test statistic, would you reject the null hypothesis established in question 42 (MUST SHOW WORK FOR THIS PROBLEM)? Group of answer choices a. yes b. no     Question 44:  Based on the previously conducted steps, we can conclude (MUST SHOW WORK FOR THIS PROBLEM):  Group of answer choices a) Tutoring did not have a significant effect on exam scores b) Tutoring reduced the exam scores c) Tutoring had a significant effect on exam scores d) Tutoring significantly increased exam scores.       Question 45: Compute Cohen’s d for this study (MUST SHOW WORK FOR THIS PROBLEM).       Question 46: Interpret Cohen's d (i.e., what does it tell you about tutoring and exam scores?) Group of answer choices a. Cannot interpret Cohen's d meaningfully b. Tutoring did not shift scores c. Tutoring shifted scores down by 0.75 SD d. Tutoring shifted scores up by 0.75 SD

Glencoe Algebra 1, Student Edition, 9780079039897, 0079039898, 2018
18th Edition
ISBN:9780079039897
Author:Carter
Publisher:Carter
Chapter10: Statistics
Section10.4: Distributions Of Data
Problem 19PFA
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Please use the following information to answer questions 43-46:

A professor randomly selects a sample of 16 students to attend additional statistics tutoring sessions for the duration of the course. At the end of the semester, the students take a nationally standardized test of statistics knowledge. Their scores average 26 with SS = 960. The population mean on that normally distributed test is μ = 20. Do the data support the conclusion that the tutoring has a significant effect? Use α = .05 and show all 5 steps. If significant, how large is the effect? 

 

Question 43: Based on the calculated test statistic, would you reject the null hypothesis established in question 42 (MUST SHOW WORK FOR THIS PROBLEM)?
Group of answer choices
a. yes
b. no
 
 
Question 44:  Based on the previously conducted steps, we can conclude (MUST SHOW WORK FOR THIS PROBLEM): 
Group of answer choices
a) Tutoring did not have a significant effect on exam scores
b) Tutoring reduced the exam scores
c) Tutoring had a significant effect on exam scores
d) Tutoring significantly increased exam scores.
 
 
 
Question 45: Compute Cohen’s d for this study (MUST SHOW WORK FOR THIS PROBLEM).

 

 
 
Question 46: Interpret Cohen's d (i.e., what does it tell you about tutoring and exam scores?)
Group of answer choices
a. Cannot interpret Cohen's d meaningfully
b. Tutoring did not shift scores
c. Tutoring shifted scores down by 0.75 SD
d. Tutoring shifted scores up by 0.75 SD
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