Inferensi menggunakan Metode Fisher

Metode Fisher menghasilkan p-value yang memberi tahu Anda apakah setidaknya satu dari hipotesis nol seharusnya ditolak. Kata kuncinya di sini adalah "setidaknya satu".

Pertimbangkan contoh saat Anda menguji efektivitas suatu diet terhadap penurunan berat badan. Diet ini telah diteliti oleh banyak peneliti dalam berbagai kondisi, tetapi semuanya menguji hipotesis nol bahwa diet tersebut tidak menyebabkan penurunan berat badan. Semua peneliti melaporkan p-value mereka, dan Anda menggunakannya dalam Metode Fisher. Mengapa masuk akal untuk menolak sebagian, tetapi tidak harus semua, hipotesis nol tersebut?

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Dasar-dasar Inferensi di Python

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Dasar-dasar Inferensi di Python

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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: Normality tests Exercise 2: Testing for normality Exercise 3: Distribution of errors Exercise 4: Fitting a normal distribution Exercise 5: Correlation tests Exercise 6: Testing for correlation Exercise 7: Autocorrelation Exercise 8: Explained variance Exercise 9: Parametric tests Exercise 10: Equal variance Exercise 11: Normality of groups Exercise 12: ANOVA Exercise 13: Non-parametric tests Exercise 14: Comparing rankings Exercise 15: Comparing medians

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: Interval kepercayaan bootstrap Exercise 3: Bootstrapping vs. kenormalan Exercise 4: Menggabungkan bukti dari p-value Exercise 5: Metode Fisher di SciPy Exercise 6: Inferensi menggunakan Metode Fisher

Latihan Saat Ini

Exercise 7: Merangkum metode Fisher Exercise 8: Uji permutasi Exercise 9: Uji permutasi untuk korelasi Exercise 10: Uji permutasi dan bootstrapping Exercise 11: Menganalisis data miring dengan uji permutasi Exercise 12: Video penutup kursus