Top Posters
Since Sunday
G
4
K
3
o
3
3
m
2
c
2
r
2
p
2
s
2
s
2
b
2
c
2
Home Q & A Board Science-Related Homework Help Mathematics Statistics and Probability
New Topic  
joshtatum92 joshtatum92
wrote...
Go to Answer
Posts: 142
Rep: 0 0
1 months ago
Use the following to answer the questions below:

Data were collected on GPA and number of Facebook friends for students in a small statistics class. Some summary statistics, partial output from the regression analysis, and a scatterplot of the data (with regression line) are provided. Assume that students in this class are typical of all students at the university.

Use three decimal places when reporting the results from any calculations, unless otherwise specified.

VariableMeanStDevMinimumMaximum
GPA3.20670.41182.40003.9500
FacebookFriends677.9307.2 185.01500.0
 
The regression equation is GPA = 3.830 - 0.000919 FacebookFriends

SourceDFSSMSFP
Regression12.311932.3119324.850.000
Error282.605340.09305​​
Total294.91727​​​

A scatterplot with a regression line shows the relationship between number of Facebook friends and G P A. The horizontal axis is labeled, Number of Facebook friends and ranges from 0 to 1600 in increments of 200. The vertical axis is labeled, G P A and has markings from 2.50 to 4.00 in increments of 0.25. A regression line starts from (200, 3.675), decreases toward the right, and ends at (1500, 2.45). The dots are randomly scattered, such that a few dots lie above the regression line, a few dots lie below the regression line, and a few dots lie on the regression line. The dots are plotted between the points, 200 to 1500 on the horizontal axis and between the points, 2.10 to 3.95 on the vertical axis. The concentration of the dots is more between the points 300 and 1100 on the horizontal axis and between the points, 2.75 and 3.75 on the vertical axis. An outlier lie at the point, (1500, 2.30). All values are approximate.


The correlation between GPA and number of Facebook friends is -0.686. Use the correlation and α = 0.05 to test for a negative linear association between GPA and number of Facebook friends. Include all details of the test.
Textbook 
Statistics: Unlocking the Power of Data

Statistics: Unlocking the Power of Data


Edition: 3rd
Authors:
Read 20 times
1 Reply
Replies
Answer verified by a subject expert
jpinette86jpinette86
wrote...
#1
Posts: 126
Rep: 1 0
1 months ago
Sign in or Sign up in seconds to unlock everything for free
More solutions for this book are available here
1

Related Topics

joshtatum92 Author
wrote...

1 months ago
This calls for a celebration Person Raising Both Hands in Celebration
noodlelicker
wrote...

Yesterday
I appreciate what you did here, answered it right Smiling Face with Open Mouth
nicolepope23
wrote...

2 hours ago
Thank you, thank you, thank you!
New Topic      
Quick Reply
Explore
Post your homework questions and get free online help from our incredible volunteers
  927 People Browsing
Start New Topic Take the Tour CoursesNew Study Tools Topics Trending Browse by Textbook
Live Chat
Related Images
  
 93
  
 231
  
 89
Your Opinion
Do you believe in global warming?
Votes: 423
Previous poll results: Does a gender wage gap exist in America?