#rstats, statistics, road safety, cycling,

Joined May 2017
I love the videos @wendoverpro creates, and the one released today on mass shootings, gun violence, and its link to current events is extremely informative and well explained. It also shows that the current problem can be solved. youtube.com/watch?v=v0aGGOK4…
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Scott White retweeted
Did you know of this meta-analytic website by @pimcuijpers et al. featuring hundreds of RCTs? In the video I'll show researchers (part I) and clients (part II) how to run a systematic meta-analysis looking into the effect of CBT on depression in older adults within 1 minute.
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Lawrence Leemis’ textbook Statistical Modeling contains a version of his famous distribution diagram specialized for lifetime distributions. math.wm.edu/~leemis/otext.pd… [pdf]
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I feel so scene.
How to become "the stats person": When asked if I know method X, 1st time: no, what's that? 2nd time: think I've heard about it 3rd-6th time: I'm not sure, but I can take a look & think with you. 7th: yeah, what do you need? After 10th time: .. Adding to my CV.
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nothing can beat this one
QOTD: What is your favourite opening line of a book? 🤔📚
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📊 Stacked bar charts can be very hard to process. There are better ways! This chart redesign is nearly a year old, but I still like it a lot. You can read the full story with intermediate steps and explanations on Medium: medium.com/@koenvandeneeckho… #dataviz #powerfulcharts
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Okay but who thought this was a good idea??
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This is a picture of a Thestral, it’s a mythical creature you can only see if you understand p-values
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Scott White retweeted
I didn't realize that ggplot2 had a handy timer function called benchplot that includes build and draw time, #RStats
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While out pre riding the next Bike for the Future ride, we came across a lost dog and his owner trying to catch him! The owner got in my @UrbanArrowcom and we chased the dog into st. Vital from the Abinojii Mikanah Greenway. He was caught on Ashworth! @BishopGrandin – at Winnipeg, Manitoba
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Since this topic is in the air, here's an image from a video I'm working on about causal inference. You should *not* control for these types of variables:
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I think it was @ryxcommar who said that really mastering the basics in stats/DS will do WONDERS for you and I am really feeling that lately. The basics are tough to master but they’re super helpful. We often build towering stacks of knowledge on shaky foundations.
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Removing on street parking in Toronto in favor of dining parklets led to a nearly 50x increase in revenue as compared to parking fees. The math is common sense - we should build cities for people, not cars!
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After publishing my newsletter about how I work 3 hours a day…..I got a lot of messages saying “What about meetings?!” So I created a 10 step guide for teams to follow to ⬆️ meeting efficiency and efficacy and ⬇️ frequency. Let's dive in.
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Scott White retweeted
Actual Progress xkcd.com/2797
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Hey @BikeWinnipeg do you have any idea where one can buy a tandem bike that can hold two adults?
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It’s ok to grieve the right decisions too.
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How do you build a high-performing company? Frank Slootman has answers. He’s led three companies to their IPOs: Data Domain, Service Now, and Snowflake. Slootman turned around these high-potential companies by implementing his “Amp It Up” philosophy. Amp It Up has three pillars: increase the tempo, raise the standards, and narrow the focus. — — Point #1: Increase the Tempo Without effective leadership, companies become sluggish as they grow. Malaise sets in. People become risk-averse. “I’ll do it right now” turns into “I’ll do it tomorrow,” which turns into “I’ll get it to you next week,” which turns into “Oops, I forgot about that.” It’s a leader’s job to prevent stasis. You have to inject the organization with energy and intensity. When people say they’ll get back to you in a week, ask them why not tomorrow or the next day? It doesn’t matter if your request is unreasonable. The point of the question is to increase people’s sense of urgency. When you change an organization’s tempo, people demand more from each other, which is the essence of a high-performing organization. Increasing the tempo isn’t just about speed. It’s also about rejecting incrementalism. People who work incrementally inch forward instead of taking bold leaps. They make timid decisions because they’re risk-averse. They work from a place of fear because screw-ups at most companies are so severely punished. But if you only aim for marginal improvements, you’ll only make marginal progress. Incrementalism will kill your company, gradually sinking it into stasis and stagnation. Avoiding risk is the riskiest strategy of all. Companies, like living organisms, need to constantly reinvent themselves. Push people to achieve their goals way faster than they think is possible. The need for speed inspires innovation. Ask somebody to do something 20% faster, and they’ll use conventional strategies. Linear progress is the best you’ll get. But if you ask them to do something 2,000% faster, they’ll have to question all their base-level assumptions and innovate. — — Point #2: Raise the Standards When people present projects to Slootman, he asks questions like: “Are you thrilled with this? Do you absolutely love it?” If people don’t respond with raging enthusiasm, he asks them to try again. Most managers set a low bar with murky expectations. Slootman sets a high bar with clear standards of success and failure. Slootman’s compensation philosophy reflected his performance culture. All of his employees have a compensation review at the end of every quarter. Bonuses are divided into a pool, depending on how well the company performs. His managers aren’t allowed to pass out an equal share. He insists on a bell-shaped distribution curve to reflect the delta between high and low performers. The problem is that, at most companies, the A-players are under-paid. To pay your top performers more, you have to pay low-performing ones less. At most companies, employees can receive bonuses without earning them. Bonuses are paid so predictably that people effectively see them as base pay. This, Slootman says, is the sure sign of an “Entitlement Culture.” Bonuses aren’t guaranteed because the company’s success isn’t either. Market forces are always shifting. Upstarts are trying to displace you. Competitors are gunning for your market share. If instability makes people uncomfortable, they belong at the California DMV, not at an Amp’d Up organization. — — Point #3: Narrow the Focus You can’t increase the tempo and raise standards unless you also narrow the focus. This principle is the most misunderstood. If you don’t take it seriously, you’ll think Slootman is telling you to work so hard that you become a slave, which isn’t the case. Focus goes against our human nature. Most teams are scatter-brained. They refuse to commit and spread themselves thinly across too many priorities (many of which are ill-defined). Your job as a leader is to direct people to what’s ultimately important. Narrow focus is also the result of clear thinking. It’s the leadership’s job to distill things down to their essentials. If leaders can’t communicate priorities at the top, how distorted will the thinking be for the rest of the team? Left to their own devices, people will work on easy and sexy (but incremental) problems. You can’t let this happen. You have to keep people focused on the levers that move the business the most. People resist focus because they can’t decide what’s important. Prioritization scares them. They get Shiny Object Syndrome, where they flock to the hot new thing instead of doubling, tripling, and quadrupling down on what ultimately matters. Everybody’s scope will expand unless you constrain it with clear and concrete goals. Anything that departs from your core mission is a distraction. — — How Amp It Up Fits Together Slootman’s system is a triad. Each pillar amplifies the other ones. Slootman asks: “How much faster do you run? How much higher are your standards? How hard do you focus?” Narrow focus is the hardest one to do. If you try to increase the tempo and raise standards without narrowing your focus, you’ll burn yourself out and ship sloppy work. Do way less, but do it faster and better. On the topic of focus, I once heard a story about a billionaire who used to share a different message every time he spoke to his company. He employed smart people and thought they wanted novelty. That changed when one day, a trusted mentor looked him in the eye and said, “You’re doing it totally wrong. Pick a simple message and say it over and over again.” His next all-hands talk was at the company holiday party. He was so nervous to repeat a simple message and potentially look like an idiot in front of the entire company that he got wasted before he went on stage. But once he got up there, he stuck to the plan. His message was simple enough to summarize in one sentence. People loved it. Since then, he hasn’t stopped repeating the same message over and over again. 25 years after the holiday party talk, he insists that a key to his success is sloganizing everything and repeating the same basic mantras. Slootman has three: Increase the tempo, raise the standards, narrow the focus.
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I feel silly tweeting this, but it's so damn useful, esp if you hadn't seen it: max(x,y) + min(x,y) = x+y max(x,y) - min(x,y) = |x-y| hence: 2max(x,y) = x+y+|x-y| and 2min(x,y) = x+y-|x-y| This holds for all real numbers x,y.
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