Learn what sampling is and why it is useful, understand the problems caused by convenience sampling, and learn about the differences between true randomness and pseudo-randomness.

Sampling and point estimates

Reasons for sampling

Simple sampling with dplyr

Simple sampling with base-R

Convenience sampling

Are findings from the sample generalizable?

Are these findings generalizable?

Pseudo-random number generation

Generating random numbers

Understanding random seeds

Introduction to Sampling

Learn how to and when to perform the four methods of random sampling: simple, systematic, stratified, and cluster.

Sampel acak sederhana dan sistematis

Pengambilan sampel acak sederhana

Sampling sistematis

Apakah systematic sampling baik-baik saja?

Pengambilan sampel acak bertingkat dan berbobot

Jenis pengambilan sampel

Pengambilan sampel berstrata

Metode pengambilan sampel yang mana?

Sampling berstrata proporsional

Sampling berstrata dengan jumlah sama

Pengambilan sampel berbobot

Sampling klaster

Manfaat pengelompokan

Melakukan cluster sampling

Membandingkan metode pengambilan sampel

3 jenis pengambilan sampel

Statistik ringkasan pada berbagai jenis sampel

Sampling Methods

Learn how to quantify the accuracy of sample statistics using relative errors, and measure variation in your estimates by generating sampling distributions.

Relative error of point estimates

Calculating relative errors

Relative error vs. sample size

Creating a sampling distribution

Replicating samples

Replication parameters

Approximate sampling distributions

Exact sampling distribution

Approximate sampling distribution

Exact vs. approximate

Standard errors and the Central Limit Theorem

Population & sampling distribution means

Population and sampling distribution variation

Sampling Distributions

Learn how to use resampling to perform bootstrapping, used to estimate variation in an unknown population. Understand the difference between sampling distributions and bootstrap distributions.

Introduction to bootstrapping

Principles of bootstrapping

With or without replacement

Generating a bootstrap distribution

Comparing sampling and bootstrap distributions

Bootstrap statistics and population statistics

Sampling distribution vs. bootstrap distribution

Compare sampling and bootstrap means

Compare sampling and bootstrap standard deviations

Confidence intervals

Confidence interval interpretation

Calculating confidence intervals

Congratulations!

Bootstrap Distributions

Coffee ratings

Spotify song attributes

Employee attrition

Pengambilan sampel adalah dasar dari statistika inferensi dan pengujian hipotesis. Topik ini sangat penting dalam analisis survei dan perancangan eksperimen. Kursus ini menjelaskan kapan dan mengapa pengambilan sampel itu penting, mengajarkan Anda cara melakukan jenis pengambilan sampel yang umum, dari simple random sampling hingga metode yang lebih kompleks seperti stratified dan cluster sampling. Selanjutnya, kursus membahas cara memperkirakan statistik populasi, serta mengukur ketidakpastian dalam estimasi Anda dengan membuat sampling distributions dan bootstrap distributions. Sepanjang kursus, Anda akan mengeksplorasi himpunan data dunia nyata tentang penilaian kopi, lagu Spotify, dan turnover karyawan.

Introduction to Statistics in R

Pelajari cara melakukan sampling di R, termasuk sampling acak sederhana, stratifikasi, dan klaster.

Sampling di R

Menguasai teknik sampling untuk mendapatkan statistik yang lebih akurat dengan data yang lebih sedikit.

Associate Data Scientist di R

Analis Data  di R

Ahli Statistik di R

Dasar-Dasar Statistik di R

Manfaat pengelompokan

Sampling di R

Latihan interaktif praktis