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

Bootstrapping for estimating a parameter

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.

distribusi-t

Kapan menggunakan t?

Probabilitas pada sebaran t

Nilai batas pada sebaran t

Mengestimasi rata-rata dengan interval t

Rata-rata waktu perjalanan kerja orang Amerika

Rata-rata jumlah jam kerja

Interval t untuk data berpasangan

t-interval pada berbagai tingkat

Memahami interval kepercayaan

Menguji mean dengan uji t

Estimasi selisih median harga buku teks

Uji perbedaan nilai median

Menafsirkan p-value

Introducing the t-distribution

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

Inference for difference in two parameters

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

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!

Comparing many means

Chp1-vid1-boot-dist-noaxes-parantheses

Chp1-vid1-bootsamp-bootpop.001

Chp1-vid1-manhattan-rents

Chp1-vid2-boot-dist-withaxes

Chp1-vid2-perc-method.001

Chp1-vid2-perc-method.002

Chp1-vid3-boot-test.001

Chp3-vid3-hrly-rate-citizen-smaller

Chp3-vid3-hrly-rate-citizen

Chp4-vid1-class-bar

Chp4-vid1-wodrsum-hist

Gss moredays

GSS data

Manhattan rent data

Runners.001

Tdistcomparetonormaldist

Di kursus ini, Anda akan mempelajari cara menggunakan teknik statistik untuk melakukan inferensi dan estimasi menggunakan data numerik. Kursus ini menggunakan dua pendekatan untuk tugas-tugas umum tersebut. Pendekatan pertama memanfaatkan bootstrapping dan permutasi untuk membuat uji dan interval kepercayaan berbasis pengambilan ulang sampel. Pendekatan kedua menggunakan hasil teoretis dan sebaran t untuk mencapai hasil yang sama. Anda akan mempelajari cara (dan kapan) melakukan uji t, membuat interval kepercayaan, dan melakukan ANOVA!

Foundations of Inference in R

Pelajari teknik bootstrapping dan distribusi-t untuk inferensi statistik pada data numerik.

Inferensi untuk Data Numerik di R

Dalam kursus ini, Anda akan mempelajari teknik-teknik untuk melakukan inferensi statistik pada data numerik.

Mengestimasi rata-rata dengan interval t

Create Your Free Account