Lab Assignment 2 Copyright © Wan Wang
1PSYC 2260 Assignment 2
Due Date: Feb 12 (Monday), 2024 at 11:59 PM on UM Learn.
Total Marks: 59
Purpose: In this assignment, you will practice recoding and computing variables in JASP. You will use the
JASP output to answer questions related to descriptive statistics. You will also practice hand calculations of
variability and z-scores. There are 6 big questions and multiple sub-questions under each.
*********************INSTRUCTIONS (Read Carefully)*************************************
1. SAVE your assignment as a PDF file before submission. To do so, Click File, Save As, and choose the
location, then click the drop down menu beside “Save as type” and select PDF.
2. Submit your PDF format assignment via UM Learn assignment submission folder. Make sure to save
the submission email sent to you as a proof. Note that only the most recent submitted copy will be saved
and graded.
3. You can keep the question wordings in this document and type your response in blue color
underneath each question or into the table for filling out the cells.
4. For questions that specify to “show calculation”, show one step of calculation by plugging in or
writing out the scores according to the appropriate formula, in addition to providing the result (round
up to three decimal places if there is infinite decimal places. For questions involving probability, use
four decimal places).
*********************INSTRUCTIONS (Read Carefully)*************************************
Q1. Using the definitional formula for SS. Fill out blanks in the table and calculate the variance and
standard deviations for the following sample (n = 9) of scores: 4, 2, 5, 2, 1, 3, 4, 3, 1 [8 marks]
X X–M (X – M)2 Calculation of Variance
Show all steps of calculation.
Only show scores below:
4 1.22 1.49 s 2 = Σ(X−M) 2/n-1
2 -0.78 0.61
5 2.22 4.93 𝑠2 = 15.57/9−1= 15.57/8= 1.95
Variance = ____1.95_________
2 -0.78 0.61 Calculation of Standard Deviation
1 -1.78 3.17 Show one step of calculation
3 0.22 0.05
s = √1.95= 1.40
4 1.22 1.49
3 0.22 0.05 Standard Deviation = ____1.40_________
1 -1.78 3.17
ΣX = 25 Σ(X – M) Σ(X – M)2
= -0.02 = 15.57
1PSYC 2260 Assignment 2
Due Date: Feb 12 (Monday), 2024 at 11:59 PM on UM Learn.
Total Marks: 59
Purpose: In this assignment, you will practice recoding and computing variables in JASP. You will use the
JASP output to answer questions related to descriptive statistics. You will also practice hand calculations of
variability and z-scores. There are 6 big questions and multiple sub-questions under each.
*********************INSTRUCTIONS (Read Carefully)*************************************
1. SAVE your assignment as a PDF file before submission. To do so, Click File, Save As, and choose the
location, then click the drop down menu beside “Save as type” and select PDF.
2. Submit your PDF format assignment via UM Learn assignment submission folder. Make sure to save
the submission email sent to you as a proof. Note that only the most recent submitted copy will be saved
and graded.
3. You can keep the question wordings in this document and type your response in blue color
underneath each question or into the table for filling out the cells.
4. For questions that specify to “show calculation”, show one step of calculation by plugging in or
writing out the scores according to the appropriate formula, in addition to providing the result (round
up to three decimal places if there is infinite decimal places. For questions involving probability, use
four decimal places).
*********************INSTRUCTIONS (Read Carefully)*************************************
Q1. Using the definitional formula for SS. Fill out blanks in the table and calculate the variance and
standard deviations for the following sample (n = 9) of scores: 4, 2, 5, 2, 1, 3, 4, 3, 1 [8 marks]
X X–M (X – M)2 Calculation of Variance
Show all steps of calculation.
Only show scores below:
4 1.22 1.49 s 2 = Σ(X−M) 2/n-1
2 -0.78 0.61
5 2.22 4.93 𝑠2 = 15.57/9−1= 15.57/8= 1.95
Variance = ____1.95_________
2 -0.78 0.61 Calculation of Standard Deviation
1 -1.78 3.17 Show one step of calculation
3 0.22 0.05
s = √1.95= 1.40
4 1.22 1.49
3 0.22 0.05 Standard Deviation = ____1.40_________
1 -1.78 3.17
ΣX = 25 Σ(X – M) Σ(X – M)2
= -0.02 = 15.57
