Erin needs to convert Personality into dummy variables. How many dummy variables should be created?

Create the dummy variables using Analyst type as the reference category $($Follow Ex $2\mathrm{.}7)$

Calculate the Engineer's age as of Jan $1,2024.$ What is the average age? $($Follow Ex $2\mathrm{.}5)$

Use the Pivot Table to display the frequency for each Personality category $($Follow Ex $2\mathrm{.}6)$

Combine Personality "Sentinel" and "Explorer" into one category "Other" $($Follow Ex$.2\mathrm{.}6)$