Lab 2

Measures of Central Tendency and Measures of Variability Assignment

Objective

Objective: To assess students’ understanding of measures of central tendency and measures of variability and their ability to use jamovi for data analysis.

Instructions

  • Open Jamovi and create a new data set with the following variables: Gender and Reaction Time (ms).
  • Enter the provided data set into the Jamovi data spreasheet.
  • Click on “Descriptives” under the “Exploration” tab in the top menu.
  • Select the “Reaction Time (ms)” variable and drag it into the “Variables” box.
  • Select the “Gender” variable and drag it into the “Split by” box.
  • Under “Statistics” and “Plots”, select all checked items depicted in Figure 1.
  • Review the generated table and graphs to ensure that the output is accurate and complete.
  • Export the output as PDF and choose the desired destination to save the PDF file.
  • Name the file with your first initial and last name and submit the file via Canvas (Lab 2 - Part 1).
  • Complete Part 2 on Canvas - 2-question quiz
Warning

Remember that this assignment must be completed individually, and that plagiarism is prohibited. Review the plagiarism policy posted on the CSUN website before submitting your assignment. Note: The generated PDF file should contain the Descriptives Table (variables across columns) and the relevant graphs. Be sure to review the file before submitting it to ensure it contains all the required information.

Grading rubric

Total points available: 90

Component Points

File submission (Part 1) containing the following:

  • the Descriptives Table (Variables across columns)
  • bar blot comparing gender
  • single graph with both histograms - w/ density curves (males, females)
  • single graph with both boxplots (males, females)
  • single graph with both QQ Plots (males, females)
 50
20-question quiz 40

Figure 1: Screenshot jamovi

Data

Copy the data below and paste it to jamovi, or download it as .csv.

Gender Reaction Time (ms)
Male 215
Male 203
Male 197
Male 208
Male 222
Male 212
Male 194
Male 219
Male 201
Male 214
Female 185
Female 172
Female 190
Female 165
Female 150
Female 180
Female 195
Female 170
Female 210
Female 148