(Sorry about blurry photo, I'm a disabled engineer, renting in Silicon Valley, so cheap Google phone)
This 'Dollar Store's calculator: Well, it got me interested in STATISTICS... A good thing to know the basics, at least...
The calculator from Scenery Electronics Limited, model SS 6618, features STAT functions for 'standard deviation' and a couple of other basic statistics metrics.
Course it also features a 'HYP' button, Dave...
Plus the usual 'arc hyp tan (-1 power) blabla bla.
But ALSO 'n!' (factorial), and an extensive set of binary hex and even OCTAL translations, and number 'complement. Even a 'RND' (random) key, useful for statistics.
I focussed on the statistics part, because that's a new subject for me...
Top lable sez "Electronic Scientific Calculator" and it's very lightweight. 8 1/2 bucks, or some such 'Dolla Store's purchasing of various over-stocked, or Mexican market over-runs they got deal (Dollar Store buys distressed production runs etc)