View the step-by-step solution to:

Question


Scatter plot of phobia (X) versus statquiz (Y). From Looking at the plot, do you think the Pearson's

r will be positive or negative? Large, Medium, or Small?

chpt52.jpgchpt5.jpg5.jpg

5.jpg

Appendix C . Data from Ihno's Experiment
Exp_
Num_
779
Coffee cups Phobia Prevmath Mathquiz Statquiz sqz
Exp_ Hr_
Hr_
Gander Major Reason cond
o- 00 - 0
o-00-
N -NOOY
NANN - N
base
pre
Hr_
Anx_ Anx_ Anx_
-NNNNW
NAWONG
69
post base pre
33
post
28
28
24
NN NN NN
38
41
39
CAN
19
11
11
14
sub num: arbitrary ID number for each participant.
Key
Gender: 1 = Female; 2 = Male.
Gear: 1 = Psychology; 2 = Premed; 3 = Biology; 4 = Sociology; 5 = Economics.
Mason: 1 = Program requirement; 2 = Personal interest; 3 = Advisor recommendation.
Exp_cond: 1 = Easy; 2 = Mod
Moderate; 3 = Difficult; 4 = Impossible.
Coffee: 0 = not a regular coffee drinker; 1 = regularly drinks coffee.
Num_cups = number of cups of
s of coffee drunk prior to the experiment on the same day.
Phobia: 0 = No phobia to 10 = Ex
- Extreme phobia.
prevmath = Number of math courses taken prior to statistics course.
Mathquiz = Score on Math Background Quiz (a blank for this value indicates that a
student did not take the quiz).
Statquiz = Score on 10-question stats quiz given one week before the experiment.
Exp sqz = Score on stats quiz given as part of the experiment (number correct,
including the 1 1th question).
HR base = Baseline heart rate (in beats per minute).
HR pre = Prequiz heart rate.
HR post = Postquiz heart rate.
Anx base = Baseline anxiety score.
Anx pre = Prequiz anxiety score.
Anx post = Postquiz anxiety score.

chpt5.jpg

chpt52.jpg

Top Answer

Sign up to view the full answer

Why Join Course Hero?

Course Hero has all the homework and study help you need to succeed! We’ve got course-specific notes, study guides, and practice tests along with expert tutors.

-

Educational Resources
  • -

    Study Documents

    Find the best study resources around, tagged to your specific courses. Share your own to gain free Course Hero access.

    Browse Documents
  • -

    Question & Answers

    Get one-on-one homework help from our expert tutors—available online 24/7. Ask your own questions or browse existing Q&A threads. Satisfaction guaranteed!

    Ask a Question
Ask a homework question - tutors are online