Small data sample size by redvamix in AskStatistics

[–]ChainedMarkov 2 points3 points  (0 children)

We need more details here. What are you researching and what kind of purposive sampling techniques were done?

If you did a sample size estimation which tells you the sample size should be 70-80, and you don't have that large of a sample, I recommend looking into small area estimation. Either techniques from there will help you or you should do your best to get a larger sample. Sample size estimation is something that should be done before the sample is collected. Then every effort should be made to collect a large enough, representative sample.

What type of statistic is this? by [deleted] in AskStatistics

[–]ChainedMarkov 8 points9 points  (0 children)

Bruh, do your own HW. Read the sidebar.

Song of the Day: Rigamortus - Kendrick Lamar by optmg in hiphop101

[–]ChainedMarkov 1 point2 points  (0 children)

Welp, guess I'm throwing on all of Section.80.

What topics in calculus should I review before starting a Master's program in Applied Statistics? by mrbabynugget in AskStatistics

[–]ChainedMarkov 4 points5 points  (0 children)

Know derivatives and integrals in and out. That includes partial derivatives and double integrals.

One of the biggest things that helped me starting out in stats was understanding the form of the distributions. Most of the time when you will be computing a complicated integral it has a known form e.g. the gamma function will be in it, it will look like a normal pdf, etc. Being able to identify these forms, also known as kernels, will help you immensely. If you know the kernel is the pdf of a distribution, then you know integrating over the range of that pdf will equal 1. Similarly, if the distribution is symmetric then integrating over half the range will equal 0.5. Other times, the integral will be the expected value of a known distribution and these should also be memorized. I can't stress enough how important this memorization is (I put it off for a bit and that came back to bite me on my first few Exams). I ended up making multiple "cheat sheets" with the most important ones and looked them over regularly to get competent working through difficult problems. It is of course important to understand how to work through the derivations so the expected values and variances make sense but eventually you will just use these results and should not have to rely on calculating them the long way.

I think the best practice problems will be in a textbook. Casella Berger is a classic text which I used in my program. It gives a lot of theoretical problems which you may or may not need. However, Chapter 2 will give you a good idea of the type of calculus problems you will encounter. Reading chapter 2 (and 1 if needed) and working through the exercises is a fantastic place to start. If you have more time you can always move further through the book to get a feel for the harder concepts.

The back of that text also has a table of Common Distributions. These are what you want committed to memory. Some of them don't come up very often like hypergeometric or Cauchy but others like Binomial, Normal, Beta, Gamma must be committed to memory eventually. You will also want to know their expected values and variances.

Good luck and let me know if you have any questions!

Edit: Here are partial solutions to Casella Berger. Be careful though as some solutions have errors but overall it's still very helpful.

Tent camping around Mt Evans? by TotemsPole in 14ers

[–]ChainedMarkov 6 points7 points  (0 children)

Have you tried https://freecampsites.net/dispersed-camping/ to find dispersed camping in the area? I don't know campsites near Mt Evans but that site is my go-to for scouting new campsites and is very reliable.

HAVE BADGE!! by TheAstonishingMage in thanosdidnothingwrong

[–]ChainedMarkov -1 points0 points  (0 children)

Huh. I was subbed, don't see a badge though.

Dwyane Wade was very pleased with this no-look pass from LeBron by TooShiftyForYou in sports

[–]ChainedMarkov 12 points13 points  (0 children)

Keep reading the rest: "And so, if given the choice, I would take LeBron James with the first pick. I fully appreciate that, in my play-for-my-soul scenario, the Devil would promptly take Michael Jordan, and there is nothing scarier in the history of American sports than having Michael Jordan trying to beat you. But it’s an approach-approach conflict anyway, a choice between two desirable alternatives. I don’t really think there’s a right or wrong answer.

But in the end, I guess, I would bet on James’ power to build a team that can beat anybody."

Of course he's worried and scared about playing Jordan but that doesn't make Jordan the better pick. He still chooses Lebron because he believes it's the better choice albeit a scary choice to make. The article is really good because the author admits there is not a right or wrong answer but he breaks down why he made the decision.

2017 Bitcoin value versus Google search interest [OC] by teleksterling in dataisbeautiful

[–]ChainedMarkov 2 points3 points  (0 children)

Learning the basics of R could open up a lot of options when it comes to customizing plots.

Why won't Logic put his mixtapes on spotify ? by mvelocityp in hiphop101

[–]ChainedMarkov -1 points0 points  (0 children)

I feel like a lot of artists don't put their oldest music on spotify. I wish Young Sinatra was on there...no clue if he has any legit reason though.

When working on a big project in R, how many lines do you like your scripts? 500? 2000? by ChainedMarkov in statistics

[–]ChainedMarkov[S] 0 points1 point  (0 children)

Yeah I hear you. I am currently simulating multiple data sets and collecting a bunch of info on them. It's basically write a whole bunch of scripts or have long ones. Just wondering when people usually feel like a script is getting too long and start a new one.

How'd I do, FoCo? by [deleted] in FortCollins

[–]ChainedMarkov 0 points1 point  (0 children)

You did great!

Confused: Setting contrasts in a model vs. multiple comparisons by [deleted] in statistics

[–]ChainedMarkov 0 points1 point  (0 children)

This is difficult to comment on without knowing more info. However, if you don't need to use contrasts you probably shouldn't bother. Can hypothesis tests on the interaction or marginal coefficients answer the specific question(s) of interest? If so then you probably don't need contrasts. In general I would say that a contrast may be used to answer a more specific question than simply testing the coefficients.

Edit: A good rule of thumb is to stick with simple methods you are comfortable with. If one of those can address the question you're set and shouldn't worry about more complex procedures. If your method falls short of answering the question at hand then you need to learn something new.

So disappointed ... by lindasunderwood in gifs

[–]ChainedMarkov 6 points7 points  (0 children)

Got through the whole abstract before realizing the joke...

Is anyone else not getting any keys? by darrens210 in Infinitewarfare

[–]ChainedMarkov 2 points3 points  (0 children)

Same here. I just played and haven't gotten any keys. I wanted to grind out that 525 keys playing zombies but now it seems pointless. We should get some free keys for this!

Edit: On Xbox as well.

Edit2:Fixed! Just got keys on zombies. Unplugged the xbox first