Exercise

Coefficient alpha by dimension

Cronbach's alpha is often used to measure the reliability of a single dimension. From our EFA, we have determined that items 1-3, 4-6 and 7-8 of brand_rep_8 are dimensions "Product Quality", "Willingness to Pay" and "Product Differentiation," respectively. Let's get the standardized alpha for each using psych and dplyr, which have been loaded into your environment.

Instructions

100 XP

Print the column names of brand_rep_8 to aid in creation of the new data frames.
Create new data frames p_quality, p_willingness and p_different each containing that dimension's respective items.
Check the standardized alpha for each dimension and compare to the standardized alpha of the survey as a whole.