[MINI] z-scores
Data Skeptic15 Maj 2015

[MINI] z-scores

This week's episode dicusses z-scores, also known as standard score. This score describes the distance (in standard deviations) that an observation is away from the mean of the population. A closely related top is the 68-95-99.7 rule which tells us that (approximately) 68% of a normally distributed population lies within one standard deviation of the mean, 95 within 2, and 99.7 within 3.

Kyle and Linh Da discuss z-scores in the context of human height. If you'd like to calculate your own z-score for height, you can do so below. They further discuss how a z-score can also describe the likelihood that some statistical result is due to chance. Thus, if the significance of a finding can be said to be 3σ, that means that it's 99.7% likely not due to chance, or only 0.3% likely to be due to chance.

Det här avsnittet är hämtat från ett öppet RSS-flöde och publiceras inte av Podme. Det kan innehålla reklam.

Avsnitt(601)

Shadow Profiles on Social Networks

Shadow Profiles on Social Networks

Emre Sarigol joins me this week to discuss his paper Online Privacy as a Collective Phenomenon. This paper studies data collected from social networks and how the sharing behaviors of individuals can ...

13 Feb 201538min

[MINI] The Chi-Squared Test

[MINI] The Chi-Squared Test

The Chi-Squared test is a methodology for hypothesis testing. When one has categorical data, in the form of frequency counts or observations (e.g. Vegetarian, Pescetarian, and Omnivore), split into tw...

6 Feb 201517min

Mapping Reddit Topics with Randy Olson

Mapping Reddit Topics with Randy Olson

My quest this week is noteworthy a.i. researcher Randy Olson who joins me to share his work creating the Reddit World Map - a visualization that illuminates clusters in the reddit community based on u...

30 Jan 201529min

[MINI] Partially Observable State Spaces

[MINI] Partially Observable State Spaces

When dealing with dynamic systems that are potentially undergoing constant change, its helpful to describe what "state" they are in.  In many applications the manner in which the state changes from on...

23 Jan 201512min

Easily Fooling Deep Neural Networks

Easily Fooling Deep Neural Networks

My guest this week is Anh Nguyen, a PhD student at the University of Wyoming working in the Evolving AI lab. The episode discusses the paper Deep Neural Networks are Easily Fooled [pdf] by Anh Nguyen,...

16 Jan 201528min

[MINI] Data Provenance

[MINI] Data Provenance

This episode introduces a high level discussion on the topic of Data Provenance, with more MINI episodes to follow to get into specific topics. Thanks to listener Sara L who wrote in to point out the ...

9 Jan 201510min

Doubtful News, Geology, Investigating Paranormal Groups, and Thinking Scientifically with Sharon Hill

Doubtful News, Geology, Investigating Paranormal Groups, and Thinking Scientifically with Sharon Hill

I had the change to speak with well known Sharon Hill (@idoubtit) for the first episode of 2015. We discuss a number of interesting topics including the contributions Doubtful News makes to getting sc...

3 Jan 201531min

[MINI] Belief in Santa

[MINI] Belief in Santa

In this quick holiday episode, we touch on how one would approach modeling the statistical distribution over the probability of belief in Santa Claus given age.

26 Dec 20149min

Populärt inom Vetenskap

allt-du-velat-veta
p3-dystopia
dumma-manniskor
rss-ufobortom-rimligt-tvivel
ufo-sverige
kapitalet-en-podd-om-ekonomi
svd-nyhetsartiklar
hacka-livet
sexet
paranormalt-med-caroline-giertz
rss-vetenskapsradion
det-morka-psyket
rss-vetenskapsradion-2
ufo-sverige-2
rss-spraket
medicinvetarna
dumforklarat
halsorevolutionen
rss-dennis-world
rss-klotet