Açıklanan varyans

Houston ve Las Vegas arasındaki kira fiyatlarının ilişkili olduğunu gördün. Peki bir şehirdeki fiyat değişimi, diğer şehirdeki fiyat değişimini ne ölçüde açıklayabilir? R-kareyi hesaplayarak bunu tam olarak nicelleştirebilirsin.

Las Vegas (lasvegas_rents) ve Houston (houston_rents) için kira değerlerini içeren bir NumPy dizisi ile her ölçüme karşılık gelen dates yüklenmiş durumda. Ayrıca pandas pd olarak, NumPy np olarak, Matplotlib plt olarak ve SciPy'den stats paketi de senin için yüklendi.

Bu egzersiz, kursun bir parçasıdır

Python'da Çıkarımın Temelleri

Kursa Göz Atın

Egzersiz talimatları

houston_rents ile lasvegas_rents arasındaki Pearson korelasyon katsayısını hesapla.
Korelasyon katsayısının karesini yazdır.

Uygulamalı etkileşimli egzersiz

Bu egzersizi bu örnek kodu tamamlayarak deneyin.

# Compute the correlation between Houston and Las Vegas
r, p_value = ____

# Print R-squared
____

Kodu Düzenle ve Çalıştır

Bu egzersiz, kursun bir parçasıdır

Python'da Çıkarımın Temelleri

AvançadoNível de habilidade

4.9+

Kursa Ücretsiz Başla

In this chapter, we'll explore the relationship between samples and statistically justifiable conclusions. Choosing a sample is the basis of making sound statistical decisions, and we’ll explore how the choice of a sample affects the outcome of your inference.

Exercise 1: Statistical inference and random sampling Exercise 2: Sampling and point estimates Exercise 3: Repeated sampling, point estimates and inference Exercise 4: Sampling and bias Exercise 5: Visualizing samples Exercise 6: Inference and bias Exercise 7: Confidence intervals and sampling Exercise 8: Normal sampling distributions Exercise 9: Calculating confidence intervals Exercise 10: Drawing conclusions from samples

Learn all about applying normality tests, correlation tests, and parametric and non-parametric tests for sound inference. Hypothesis tests are tools, and choosing the right tool for the job is critical for statistical decision-making. While you may be familiar with some of these tests in introductory courses, you'll go deeper to enhance your inferential toolkit in this chapter.

Exercise 1: Normallik testleri Exercise 2: Normallik testi Exercise 3: Hataların dağılımı Exercise 4: Normal dağılım uydurma Exercise 5: Korelasyon testleri Exercise 6: Korelasyon testi Exercise 7: Otokorelasyon Exercise 8: Açıklanan varyans

Geçerli egzersiz

Exercise 9: Parametrik testler Exercise 10: Eşit varyans Exercise 11: Grupların normalliği Exercise 12: ANOVA Exercise 13: Parametrik olmayan testler Exercise 14: Sıralamaları karşılaştırma Exercise 15: Medyanları karşılaştırma

In this chapter, you'll measure and interpret effect size in various situations, encounter the multiple comparisons problem, and explore the power of a test in depth. While p-values tell you if a significant effect is present, they don't tell you how strong that effect is. Effect size measures how strong an effect a treatment has. Master the factors underpinning effect size in this chapter.

Exercise 1: Effect size Exercise 2: Effect size for means Exercise 3: Effect size for correlations Exercise 4: Effect size for categorical variables Exercise 5: Multiple comparisons and corrections Exercise 6: Multiple comparisons problem Exercise 7: Bonferonni-Holm correction Exercise 8: Power of a test Exercise 9: What is power anyway?Exercise 10: Power for experimental design Exercise 11: Computing power and sample sizes

You’ll expand your inferential statistics toolkit further with a look at bootstrapping, permutation tests, and methods of combining evidence from p-values. Bootstrapping will provide you with a first look at statistical simulation. In the lesson meta-analysis, you’ll learn all about combining results from multiple studies. You’ll end with a look at permutation tests, a powerful and flexible non-parametric statistical tool.

Exercise 1: Bootstrapping Exercise 2: Bootstrap confidence intervals Exercise 3: Bootstrapping vs. normality Exercise 4: Combining evidence from p-values Exercise 5: Fisher's method in SciPy Exercise 6: Inference using Fisher's method Exercise 7: Summarizing Fisher's method Exercise 8: Permutation tests Exercise 9: Permutation tests for correlations Exercise 10: Permutation tests and bootstrapping Exercise 11: Analyzing skewed data with a permutation test Exercise 12: Course wrap-up video