statistics   185030

« earlier    

Stack Overflow Developer Survey 2017
Get insights on the world’s developers from the largest and most comprehensive survey ever. Demographics. Technologies. Salaries. Career satisfaction.
engineering  jobs  programming  stackoverflow  hiring  job  software  statistics  via:popular 
3 days ago by msurbey
The Past Sure Is Tense: On Interpreting Phylogenetic Divergence Time Estimates | bioRxiv
Divergence time estimation --- the calibration of a phylogeny to geological time --- is a integral first step in modelling the tempo of biological evolution (traits and lineages). However, despite increasingly sophisticated methods to infer divergence times from molecular genetic sequences, the estimated age of many nodes across the tree of life contrast significantly and consistently with timeframes conveyed by the fossil record. This is perhaps best exemplified by crown angiosperms, where molecular clock (Triassic) estimates predate the oldest (Early Cretaceous) undisputed angiosperm fossils by tens of millions of years or more. While the incompleteness of the fossil record is a common concern, issues of data limitation and model inadequacy are viable (if underexplored) alternative explanations. In this vein, Beaulieu et al. (2015) convincingly demonstrated how methods of divergence time inference can be misled by both (i) extreme state-dependent molecular substitution rate heterogeneity and (ii) biased sampling of representative major lineages. While these (essentially model-violation) results are robust (and probably common in empirical data sets), we note a further alternative: that the configuration of the statistical inference problem alone precluded the reconstruction of the paleontological timeframe for the crown age of angiosperms. We demonstrate, through sampling from the joint prior (formed by combining the tree (diversification) prior with the various calibration densities specified for fossil-calibrated nodes), that with no data present at all, an Early Cretaceous crown angiosperms is rejected (i.e., has essentially zero probability). More worrisome, however, is that for the 24 nodes calibrated by fossils, almost all have indistinguishable marginal prior and posterior age distributions, indicating an absence of relevant information in the data. Given that these calibrated nodes are strategically placed in disparate regions of the tree, they essentially anchor the tree scaffold, and so the posterior inference for the tree as a whole is largely determined by the pseudo-data present in the (often arbitrary) calibration densities. We recommend, as for any Bayesian analysis, that marginal prior and posterior distributions be carefully compared, especially for parameters of direct interest. Finally, we note that the results presented here do not refute the biological modelling concerns identified by Beaulieu et al. (2015). Both sets of issues remain apposite to the goals of accurate divergence time estimation, and only by considering them in tandem can we move forward more confidently.
cladistics  statistics  modeling  paleontology  inference  rather-interesting  modeling-is-not-mathematics 
3 days ago by Vaguery
Stack Overflow Developer Survey 2017
Get insights on the world’s developers from the largest and most comprehensive survey ever. Demographics. Technologies. Salaries. Career satisfaction.
2017  statistics  stackoverflow  salary 
3 days ago by dreikanter
iPad Optics | Asymco
If we look further we see that the iPad is still a much loved and much used product. Data from the Pew Internet Survey shows that tablet ownership among US adults increased from 45% in April 2015 to 48% in April 2016 and 51% in November 2016. The rise has been steady. Although this counts tablets, the iPad had 85% share of the U.S. market for tablets priced above $200 so it’s a fair assumption that the iPad audience is growing. Similar data exists for the UK.
tablets  iPad  penetration  sales  review  statistics  Asymco  2017 
3 days ago by inspiral
‘Bad luck’ with random DNA errors is responsible for two-thirds of cancer mutations, study says - LA Times
In research published Thursday in the journal Science, geneticist Bert Vogelstein and biostatistician Cristian Tomasetti demonstrate that most cancer risk stems not from bad genes, environmental toxins or poor lifestyle choices, but from simple random mutations.

Every time a normal cell divides, about three mutations occur. The body has ingenious DNA-repair mechanisms to limit the damage, and not all mutations occur in parts of the genome that are active. So sometimes our luck is good, Vogelstein said.
health  research  cancer  biology  statistics 
3 days ago by jefframnani
survminer 0.3.0 | R-bloggers
I’m very pleased to announce that survminer 0.3.0 is now available on CRAN. survminer makes it easy to create elegant and informative survival curves. It includes also functions for summarizing and inspecting graphically the Cox proportional hazards model assumptions.
R  statistics 
3 days ago by campion1581

« earlier    

related tags

2016  2017  4chan  abdsc  abuse  academia  against  ai  algorithms  america  analysis  analytics  asymco  aviation  awstats  basketball  bayes  bayesian  big_data  bigdata  biology  blog  browser  business  cancer  carousel  cds_101  cds_102  census  children  cities  cladistics  cli  clustering  collaboration  compsci  confidence-interval  course  coverage  cpi  cpih  crime  cultural_analytics  cultural_analytics_lab  cuny  d3  data-analysis  data-science  data  data_analysis  data_cleaning  data_science  data_vis  database  datamining  datascience  datasets  death  deeplearning  development  dimension-reduction  domestic_violence  donaldtrump  dyk  economics  economy  education  engineering  england  evidence  evil  examples  eyetracking  fear  for-child  framework  frequentism  frequentist-statistics  frequentist  fun  game  gaming  git  github  graphics  guide  guides  guns  happiness  hatred  health  hearthstone  hiring  history  home  homeless  homelessness  house  how-to  humor  idiots  inference  inflation  interview  ipad  issue  javascript  job  jobs  journalism  katrina  kids  land  language  learning  lev_manovich  local  logging  london  lsa  mac  machine-learning  machine_learning  machinelearning  mainstream  male  market  math  mentalhealth  meta  methods  michaelgove  ml  model  modeling-is-not-mathematics  modeling  money  murder  nature  neworleans  news  nola  ons  open  opendaba  opendata  openscience  opensource  optimization  osx  overflow  paleontology  parody  patterns  pca  penetration  plot  politics  population  probability-theory  probability  programmers  programming  project_ideas  property  psychology  publication_bias  python  r  racism  random-matrices  rather-interesting  read2of  redit  reference  regression  reporting  research  resources  results  review  salary  sales  science  scientific  shiny  software  sql  stack  stackexchange  stackoverflow  stats  subreddits  survey  sysadmin  tablets  teaching  technical  ted  teen_media_use  terrorism  textbooks  the_donald  tidy_data  time-series  tips  to-understand  tools  trevormartin  trump  tutorial  tutorials  ubuntu  uk  unix  us-pres  usa  usability  ux  veterans  violence  visualisation  visualization  web-design  web  womenshistorymonth  woocommerce  work  worldbank  wtf 

Copy this bookmark: