Pizza Girl, a pizza delivery girl who is a regular contributor on Slice, tallied up and analyzed the time she spends on various duties in her pizzeria. This is just the first part in a series, but so far she determined that she spends 67% of her shift driving.
According to her pay schedule, she makes less money while driving ($4.95/hr) than she does while in the pizzeria ($7.50).
For starters, I think we should looked at the expected value of her shift: E[x] = .67*4.95 + .33*7.50 + E[tip] = 5.79 + E[tip].
So we can see–assuming driving consistently makes up 67% of her time and the other 33% is in the pizzeria–that she has to earn $6.71 in tips, on average, to hit the $12.50/hr mark, which is what she considers a successful shift.
I’m looking forward to the rest of her analysis, so stay tuned.
Jared Lander is the Chief Data Scientist of Lander Analytics a New York data science firm, Adjunct Professor at Columbia University, Organizer of the New York Open Statistical Programming meetup and the New York and Washington DC R Conferences and author of R for Everyone.