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Curs

Inference for Numerical Data in R

AvansatNivel de competențe

Actualizat 09.2020

In this course you'll learn techniques for performing statistical inference on numerical data.

Începe cursul gratuit

RProbability & Statistics

4 h

15 videoclipuri

49 Exerciții

3,650 XP

14,237

Certificat de realizare

Îndrăgit de cursanți din mii de companii

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Încearcă pentru afaceri

Descrierea cursului

In this course, you'll learn how to use statistical techniques to make inferences and estimations using numerical data. This course uses two approaches to these common tasks. The first makes use of bootstrapping and permutation to create resample based tests and confidence intervals. The second uses theoretical results and the t-distribution to achieve the same result. You'll learn how (and when) to perform a t-test, create a confidence interval, and do an ANOVA!

Cerințe prealabile

Foundations of Inference in R

1

Bootstrapping for estimating a parameter

In this chapter you'll use bootstrapping techniques to estimate a single parameter from a numerical distribution.

Welcome to the course!

Generate bootstrap distribution for median

Review percentile and standard error methods

Calculate bootstrap interval using both methods

Which method more appropriate: percentile or SE?

Doctor visits during pregnancy

Average number of doctor's visits

SD of number of doctor's visits

Re-centering a bootstrap distribution

Test for median price of 1 BR apartments in Manhattan

Conclude the hypothesis test on median

Test for average weight of babies

Începe capitolul

2

Introducing the t-distribution

In this chapter you'll use Central Limit Theorem based techniques to estimate a single parameter from a numerical distribution. You will do this using the t-distribution.

t-distribution

Probabilities under the t-distribution

Cutoffs under the t-distribution

Estimating a mean with a t-interval

Average commute time of Americans

Average number of hours worked

t-interval for paired data

t-interval at various levels

Understanding confidence intervals

Testing a mean with a t-test

Estimate the median difference in textbook prices

Test for a difference in median test scores

Interpret the p-value

Începe capitolul

3

Inference for difference in two parameters

In this chapter you'll extend what you have learned so far to use both simulation and CLT based techniques for inference on the difference between two parameters from two independent numerical distributions.

Hypothesis testing for comparing two means

Evaluating the effectiveness of stem cell treatment

Evaluating the effectiveness of stem cell treatment (cont.)

Conclusion of the hypothesis test

Evaluating the relationship between smoking during pregnancy and birth weight

Bootstrap CI for difference in two means

Quantifying the relationship between smoking during pregnancy and birth weight

Median lengths of pregnancies for smoking and non-smoking mothers

Comparing means with a t-test

Hourly pay vs. citizenship status

Estimating the difference of two means using a t-interval

Începe capitolul

4

Comparing many means

In this chapter you will use ANOVA (analysis of variance) to test for a difference in means across many groups.

Vocabulary score vary between vs. (self identified) social class

EDA for vocabulary score vs. social class

Comparing many means, visually

ANOVA for vocabulary score vs. (self identified) social class

Conditions for ANOVA

Checking the normality condition

Checking the constant variance condition

Post-hoc testing

Calculate alpha*

Compare pairwise means

Congratulations!

Începe capitolul

Inference for Numerical Data in R

Curs
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În următoarele trasee

Inferență statistică în R

instructor

Mine Cetinkaya-Rundel

Mine Cetinkaya-Rundel

Associate Professor at Duke University & Data Scientist and Professional Educator at RStudio

colaboratori

Curs resurse

Chp1-vid1-boot-dist-noaxes-paranthesesset de date

Chp1-vid1-bootsamp-bootpop.001set de date

Chp1-vid1-manhattan-rentsset de date

Chp1-vid2-boot-dist-withaxesset de date

Chp1-vid2-perc-method.001set de date

Chp1-vid2-perc-method.002set de date

Chp1-vid3-boot-test.001set de date

Chp3-vid3-hrly-rate-citizen-smallerset de date

Chp3-vid3-hrly-rate-citizenset de date

Chp4-vid1-class-barset de date

Chp4-vid1-wodrsum-histset de date

Gss moredaysset de date

GSS dataset de date

Manhattan rent dataset de date

Runners.001set de date

Tdistcomparetonormaldistset de date

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