Refer to Exercise 2.47 for a description of the problem and data set. a. The variable Personality

Question:

Refer to Exercise 2.47 for a description of the problem and data set.

a. The variable Personality contains four unordered personality types: Analyst, Diplomat, Explorer, and Sentinel. To facilitate subsequent analyses, Erin needs to convert this variable into dummy variables. How many dummy variables should be created? Create the dummy variables using Analyst type as the reference category. How many observations are in the reference category?

b. The variable Level contains three ordered position levels: Engineer I (lowest), Engineer II, and Senior Engineer (highest). Replace the level names with scores ranging from 1 (lowest) to 3 (highest). What is the average level score of the engineers?

Data from Exercises 2.47

Erin Thomas, an HR manager of an engineering firm, wants to perform an analysis on the data about the company’s engineers. The variables included in the data are date of birth (BirthDate), personality type according to the Myers-Briggs Personality assessment (Personality), annual salary (Salary), level of the position (Level), and number of professional certificates achieved (Certificates). The accompanying table shows a portion of the data set.