Aplicando a correção de Bonferroni

Depois de identificar diferenças significativas entre os grupos de terapia com o HSD de Tukey, queremos confirmar nossas conclusões usando a correção de Bonferroni. A correção de Bonferroni é um ajuste estatístico conservador usado para contornar o problema de múltiplas comparações. Ela reduz a chance de obter falsos positivos ao ajustar o nível de significância. No contexto do seu estudo sobre a eficácia de CBT, DBT e ACT, aplicar a correção de Bonferroni ajuda a garantir que as diferenças significativas observadas entre os grupos de terapia não sejam fruto do acaso.

O DataFrame therapy_outcomes foi novamente carregado, junto com pandas as pd, from scipy.stats import ttest_ind e from statsmodels.sandbox.stats.multicomp import multipletests.

Este exercicio faz parte do curso

Projeto experimental em Python

Instruções do exercicio

Realize testes t independentes entre todos os pares de grupos de terapia em therapy_pairs e adicione as p-values (p_val) à lista p_values.
Aplique a correção de Bonferroni para ajustar as p-values dos múltiplos testes e imprima-as.

exercicio interativo prático

Tente este exercicio completando este código de exemplo.

p_values = []

therapy_pairs = [('CBT', 'DBT'), ('CBT', 'ACT'), ('DBT', 'ACT')]

# Conduct t-tests and collect P-values
for pair in ____:
    group1 = therapy_outcomes[therapy_outcomes['Therapy_Type'] == ____]['Anxiety_Reduction']
    group2 = therapy_outcomes[therapy_outcomes['Therapy_Type'] == ____]['Anxiety_Reduction']
    t_stat, p_val = ____(group1, group2)
    p_values.____(p_val)

# Apply Bonferroni correction
print(____(____, alpha=0.05, method='____')[1])

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Este exercicio faz parte do curso

Projeto experimental em Python

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Building knowledge in experimental design allows you to test hypotheses with best-practice analytical tools and quantify the risk of your work. You’ll begin your journey by setting the foundations of what experimental design is and different experimental design setups such as blocking and stratification. You’ll then learn and apply visual and analytical tests for normality in experimental data.

Exercise 1: Setting up experiments Exercise 2: Non-random assignment of subjects Exercise 3: Random assignment of subjects Exercise 4: Experimental data setup Exercise 5: Blocking experimental data Exercise 6: Stratifying an experiment Exercise 7: Which was stratified?Exercise 8: Normal data Exercise 9: Visual normality in an agricultural experiment Exercise 10: Analytical normality in an agricultural experiment

You'll delve into sophisticated experimental design techniques, focusing on factorial designs, randomized block designs, and covariate adjustments. These methodologies are instrumental in enhancing the accuracy, efficiency, and interpretability of experimental results. Through a combination of theoretical insights and practical applications, you'll acquire the skills needed to design, implement, and analyze complex experiments in various fields of research.

Exercise 1: Factorial designs: principles and applications Exercise 2: Understanding marketing campaign effectiveness Exercise 3: Heatmap of campaign interactions Exercise 4: Factorial designs and randomized block designs Exercise 5: Randomized block design: controlling variance Exercise 6: Implementing a randomized block design Exercise 7: Visualizing productivity within blocks by incentive Exercise 8: ANOVA within blocks of employees Exercise 9: Covariate adjustment in experimental design Exercise 10: Importance of covariates Exercise 11: Covariate adjustment with chick growth

Master statistical tests like t-tests, ANOVA, and Chi-Square, and dive deep into post-hoc analyses and power analysis essentials. Learn to select the right test, interpret p-values and errors, and skillfully conduct power analysis to determine sample and effect sizes, all while leveraging Python's powerful libraries to bring your data insights to life.

Exercise 1: Escolhendo o teste estatístico correto Exercise 2: Escolhendo o teste certo: petroquímicos Exercise 3: Escolhendo o teste certo: recursos humanos Exercise 4: Escolhendo o teste certo: finanças Exercise 5: Análise post-hoc após ANOVA Exercise 6: Tratamentos de ansiedade ANOVA Exercise 7: Aplicando o teste de Tukey HSD Exercise 8: Aplicando a correção de Bonferroni

Exercicio Atual

Exercise 9: Valores de p, alfa e erros Exercise 10: Análise da durabilidade dos brinquedos Exercise 11: Visualização das diferenças de durabilidade Exercise 12: Papel dos níveis de significância Exercise 13: Análise de potência: tamanho da amostra e do efeito Exercise 14: Objetivo do tamanho do efeito Exercise 15: Estimativa do tamanho da amostra necessária para o estudo de energia

Hop into the complexities of experimental data analysis. Learn to synthesize insights using pandas, address data issues like heteroscedasticity with scipy.stats, and apply nonparametric tests like Mann-Whitney U. Learn additional techniques for transforming, visualizing, and interpreting complex data, enhancing your ability to conduct robust analyses in various experimental settings.

Exercise 1: Synthesizing insights from complex experiments Exercise 2: Visualizing loan approval yield Exercise 3: Exploring customer satisfaction Exercise 4: Effectively communicating experimental data Exercise 5: Addressing complexities in experimental data Exercise 6: Check for heteroscedasticity in shelf life Exercise 7: Exploring and transforming shelf life data Exercise 8: Applying nonparametric tests in experimental analysis Exercise 9: Visualizing and testing preservation methods Exercise 10: Further analyzing food preservation techniques Exercise 11: Congratulations!