The tutor returns to a more academic focus with today’s post on goodness-of-fit. In business, as well as in science, people often try to fit data to a mathematical equation. The obvious advantage of doing so is being able to …
Statistics: goodness-of-fit test with Chi-square distribution Read more »
The tutor offers a case study in statistics. Around here, forestry might be the leading industry. Of course, I hardly ever see evidence of it; up in the hills is where the work is done. As I understand, one angle …
The tutor continues exploring annuities. In my previous post I introduced the idea of an annuity with an example. That example had each payment at month’s-end; hence, it was an ordinary annuity. With an annuity due, the payment is …
Financial math: ordinary annuity versus annuity due Read more »
A lifetime ago, the tutor studied financial planning. That’s when he got acquainted with the HP-10B. Of the financial calculators I know, the Hewlett-Packard HP-10B is potentially the easiest to use. One feature of particular value to anyone in financial …
Financial math: interest rate conversions on the HP-10B Read more »
The tutor continues to investigate energy alternatives. The comparison between electric and gasoline cars might depend on your point of view. Someone told me a while ago that electric cars are 50% efficient. I was surprised to hear that number, …
Energy efficiency: electric cars vs gasoline-powered cars Read more »
When the tutor was in high school, a course called Consumer Education was mandatory. The beautiful, energetic high school students of today will, sooner or later, be workers. They will gain one kind of freedom at the expense of another. …
Tutoring high school, I’ve never been asked this. The tutor looks into a question he’s long wondered about. The phrase “free port” means pretty much what I expected: a port where goods can be exchanged, duty-free, then reshipped. As long …