PLEASE READ THE FOLLOWING CAREFULLY AND INCLUDE ALL LISTED COMPONENTS/FOLLOW
EACH STEP!
The grading scheme is based on the following:
• use of R wherever possible.
• an outcome is significant only if it has a probability less than .05.
• with each question, indicate its number (e.g., Question #1), and include the answer as a
formal write-up (as demonstrated in workshop) and the full R output (including syntax).
• a hard copy is required with single-sided pages.
• use APA 7 formatting (e.g., double spacing, Times New Roman 12 pt. font, 1-inch
margins) for all components of all written answers and include a title page.
• a complete answer must, at minimum, state the interest of the question, define and
label the variables involved, describe the groups (if applicable), name the test used to
analyse the data (where applicable), report the statistical results according to APA
guidelines – e.g., t(45) = 3.50, p = .04, and provide meaningful conclusions. Any
additional components required will vary by question.
• the R output for each question will reflect the analysis you have used and, thus, must be
consistent with the name of the test stated in the written section of your answer. Note
that if the corresponding output is not placed after each question, it will not be
marked. This R output must reflect your name as outlined in the paragraph below.
The data for this assignment represent information from a previous PSYC 3015 class on
thoughts and behaviours regarding statistics. The data file (Assign1FA22) can be found under
Assignments on the PSYC3015 Blackboard page. Save it (do not save it in Downloads as this
folder clears when you sign out) and rename it as your last name with your first initial, e.g., if
your name is Tom Smith, your file name on all your output will be Assign1TSMITH.robj.
The Assign1FA22 file has been managed. It is a working file for you to proceed and complete
Assignment 1. You do not need to do any further data management (no reversing scores,
transformations, replacing missing data, etc.).
1. Write a formal report describing the participants of the PSYC 3015 class and variables
assessing general/statistical thoughts and behaviours. Use the appropriate descriptive
statistics for each type of variable (i.e., descriptive/frequency data) and interpret (include all
variables except for ANXIETYGR, which has been created for question 2). On a separate page,
include an APA formatted table illustrating the means, n sizes, standard deviations, and
minimums and maximums of the continuous variables only. The question 1 report should be
no longer than one and a half pages (1.5 pages, double-spaced), not including the one APA
formatted table.
2. Please note, the variable ANXIETY1 was split into 2 groups using the median split method. The
grouped variable is called ANXIETYGR in your data set. The low anxiety group had anxiety
scores ranging from 0 to 12 and the high anxiety group had anxiety scores ranging from 13 to
24. Determine whether students’ willingness to complete PSYC 3015 even if it was not a
requirement (at time 1; COURSE1) is conditional on whether students experienced high or
low anxiety (at time 1; ANXIETYGR).
3. The frequency distribution of perceived control over academically stressful events at time 1
(CONTROL1) for a previous year’s cohort (n = 145) is as follows:
Number of Cases
(frequency counts)
Response
(perceived control)
6 None
43 A little
68 Some
28 A lot
Does the CONTROL1 frequency distribution from this assignment’s cohort fit the model
suggested by the previous year’s cohort shown above?