Part 3: Office Hours

Overview

Teaching: 60 min
Exercises: 35 min

Questions

• Can I apply anything I’ve learned today to new data?

Objectives

• Compute a total score for the ADT.

• Describe the distribution of total scores.

• Visualize the distribution of total scores.

• Examine the relationship between ADT and Reading scores.

• Visualize the relationship between ADT and Reading Scores.

• Conduct CTT reliability and item analyses for the ADT.

• Conduct CRT dependability and item analyses for the ADT.

• Generate individual PDF score reports.

• Generate a presentation or report.

Our Data

Describe, Analyze, and Report Scores for Test Data

Data: Isbell (2017). The data come from a 10-item embedded academic definitions test.

Use this data or your own to try some of the objectives above.

download.file("https://raw.githubusercontent.com/gtlaflair/ltrc-2019/gh-pages/data/adt_dataset.csv",
              "data/adt_dataset.csv", mode = "wb")

You can download our answers here.

download.file("https://raw.githubusercontent.com/gtlaflair/ltrc-2019/gh-pages/scripts/day-1-problem-set-solution.R",
              "scripts/day-1-problem-set-solution.R", mode = "wb")

Key Points

• Yes! You can apply this stuff to new data!