Rescale index 0-100

[Marcus Eklund]

Hi, How do you rescale an additive index based on ten questions (each ranging from 1-6) so that the entire index scale from 0-100?

All the best,

[Joseph Coveney]

Theoretical or observed?

Theoretical:

egen byte tot = rowtotal(question01-question10)
generate double idx = 100 * (tot - 10) / (60 - 10)

Observed:

egen byte tot = rowtotal(question01-question10)
summarize tot, meanonly
generate double idx = 100 * (tot - r(min)) / (r(max) - r(min))