Learn why hypothesis testing is useful, and step through the workflow for a one sample proportion test. In doing so, you'll encounter important concepts like z-scores, p-p-values, and false negative and false positive errors. The Stack Overflow survey and late medical shipments datasets are introduced.

Uji hipotesis dan skor-z

Kegunaan A/B testing

Menghitung mean sampel

Menghitung z-score

nilai-p

Persidangan pidana dan uji hipotesis

Opsi

Dua ekor

Ekor kiri

Ekor kanan

Ekor kiri, ekor kanan, dua ekor

Menghitung p-value

Signifikansi statistik

Keputusan berdasarkan p-value

Menghitung interval kepercayaan

Kesalahan positif palsu (Tipe I)

Kesalahan negatif palsu (Tipe II)

Bukan kesalahan

Kesalahan Tipe I dan Tipe II

Introduction to Hypothesis Testing

Learn how to test for differences in means between two groups using t-tests, and how to extend this to more than two groups using ANOVA and pairwise t-tests.

Performing t-tests

Hypothesis testing workflow

Two sample mean test statistic

Calculating p-values from t-statistics

Why is t needed?

The t-distribution

From t to p

Paired t-tests

Is pairing needed?

Visualizing the difference

Using t.test()

ANOVA tests

Visualizing many categories

Conducting an ANOVA test

Pairwise t-tests

Two-Sample and ANOVA Tests

Learn how to test for differences in proportions between two groups using proportion tests, extended it to more than two groups with chi-square independence tests, and return to the one sample case with chi-square goodness of fit tests.

One-sample proportion tests

t for proportions?

Test for single proportions

Two-sample proportion tests

Test of two proportions

prop_test() for two samples

Chi-square test of independence

The chi-square distribution

How many tails for chi-square tests?

Performing a chi-square test

Chi-square goodness of fit tests

Visualizing goodness of fit

Performing a goodness of fit test

Proportion Tests

Learn about the assumptions made by parametric hypothesis tests and see how simulation-based and rank-based non-parametric tests can be used when those assumptions aren't met.

Assumptions in hypothesis testing

Common assumptions of hypothesis tests

Testing sample size

The "There is only one test" framework

There is only one test

Specifying and hypothesizing

Continuing the infer pipeline

Generating & calculating

Observed statistic and p-value

Non-parametric ANOVA and unpaired t-tests

Simulation-based t-test

Rank sum tests

Congratulations!

Non-Parametric Tests

Late Shipments

Late shipments Bootstrap Distribution

Democratic Presidential Candidates by County

StackOverflow Survey

Late Shipments w/ Freight Cost Group

Pengujian hipotesis memungkinkan Anda mengajukan pertanyaan tentang himpunan data Anda dan menjawabnya secara ketat secara statistik. Dalam kursus ini Anda akan mempelajari cara dan waktu menggunakan uji umum seperti uji t, uji proporsi, dan uji chi-square. Anda akan mendapatkan pemahaman mendalam tentang cara kerjanya dan asumsi yang mendasarinya. Anda juga akan mempelajari bagaimana berbagai uji hipotesis saling berkaitan menggunakan kerangka "Hanya ada satu uji", serta menggunakan uji nonparametrik yang memungkinkan Anda menghindari persyaratan uji hipotesis tradisional. Sepanjang kursus, Anda akan mengeksplorasi survei pengguna Stack Overflow dan himpunan data keterlambatan pengiriman perlengkapan medis.

Sampling in R

Pelajari uji hipotesis di R, termasuk kapan dan cara menggunakan uji t, uji proporsi, dan uji chi-kuadrat.

Pengujian Hipotesis di R

Associate Data Scientist di R

Analis Data  di R

Ahli Statistik di R

Dasar-Dasar Statistik di R

Menolak hipotesis nol padahal hipotesis nol benar.

Menetapkan terdakwa bersalah padahal sebenarnya terdakwa tidak bersalah.

Gagal menolak hipotesis nol padahal hipotesis nol salah.

Menetapkan terdakwa tidak bersalah padahal sebenarnya terdakwa melakukan kejahatan.

Menolak hipotesis nol padahal hipotesis nol salah.

Menetapkan terdakwa tidak bersalah padahal mereka memang tidak bersalah.

Kesalahan Tipe I dan Tipe II

Pengujian Hipotesis di R

Latihan interaktif praktis