1,159 reputation
2313
bio website joetaxpayer.com
location Sudbury, MA
age 51
visits member for 1 year, 7 months
seen Aug 27 at 14:25

Father, husband, puppy person, and financial author.

Blogger at the eponymous JoeTaxpayer.com

Blogger at RothMania

Blogger at Stock Options Cafe

Moderator at the usenet group misc.taxes.moderated

Guest author at TurboTax

Guest author at H&R Block

On Twitter at @joetaxpayerblog

On Facebook at Joetaxpayer


Aug
14
comment I am getting a number below zero when caluclating out two standard deviations from the mean. Is this ok?
The 'less than zero' simply means the distribution isn't a perfect bell curve. Just like a live adult can't have negative height or weight, even if the curve shows that some portion should, the homicide rate can't go negative.
Aug
4
comment How to plot decimals on a line graph?
Can you add context to the question? The answer will depend on why you are graphing these numbers. 4 digit precision is tough to show on a graph, even if the scale only went from 0 to 1.
Aug
4
comment Solving an equation in $x$, in which $x$ occurs as exponent four times
When X=0, the result is 2, no?
Jul
29
comment Why is it that if I count years from 2011 to 2014 as intervals I get 3 years, but if I count each year separately I get 4 years?
+1 right. I don't see why this answer or mine got a DV.
Jul
28
answered Why is it that if I count years from 2011 to 2014 as intervals I get 3 years, but if I count each year separately I get 4 years?
Jul
8
comment Which base of numerical system have $\frac 15 = 0.33333\ldots$?
mathsisfun.com/binary-decimal-hexadecimal-converter.html is worth a look. It offers decimal, binary and hex conversions. It might help you see the relationships, ex, enter binary .010101010101 and see what this is in decimal.
Jul
8
comment I have issue in calculating log values
"3 powers to 10" - is that a common way to present this? I would say "10 to the 3rd power" or simply "10 to the 3rd."
Jul
3
comment What makes Torus Special
The posted link is no longer valid.m
Jul
2
comment How would you count a base > 36 system?
@jpmc26 - got it, thanks. I see the irony there.
Jul
1
comment How would you count a base > 36 system?
I suppose that if a joke is funny, it needs no explanation. The answer looks good. Not sure how it's hilarious, not even a bit.
Jun
18
comment Coin in City Problem
What have you tried so far?
Jun
10
answered Is it possible to calculate the arithmetic mean from the geometric mean?
Jun
3
comment If $ab=3$ and $\frac1{a^2}+\frac1{b^2}=4,$ then $(a-b)^2=\;$?
He states 'you know that $(a-b)^2=30$ ' - but it's not clear that we do. That's the question OP is asking.
Jun
3
comment If $ab=3$ and $\frac1{a^2}+\frac1{b^2}=4,$ then $(a-b)^2=\;$?
@Tunk-Fey - Why? each step flows well from the prior one.
Jun
3
comment Negative Exponents, Why?
Nice work. The only thing I'd have included is the similarity to the negative ide of the number line, 3,2,1,0,-1,-2, etc. Why does bopping negative not bother OP there but it does for exponents?
May
22
revised General approach to factoring
correct the word factorize
May
22
suggested suggested edit on General approach to factoring
May
17
comment Question regarding basic probability.
Why do you call (a) coincidence? His method is what I'd have used, and it's correct.
Apr
15
comment Probability Equation That I am missing here
@Adam - There are times that an 'extreme' example helps clarify a situation. Say you have 1000 coin flips. The results form a nice bell curve of all the possible HT combinations. Chances of 1000H0T is near zero, but appears as a result, as does 499H501T, etc. The chance of 500H500T actually feels pretty slim to me. In fact, it's about 1 in 40. calculator.tutorvista.com/coin-toss-probability-calculator.html is a calculator to play with the numbers.
Apr
14
comment Probability Equation That I am missing here
See my edit. Does that help? Read up on Pascal's Triangle.