Cálculo de probabilidades

Você é o responsável pela equipe de vendas e é hora de fazer as avaliações de desempenho, começando por Amir. Como parte da análise, você deve selecionar aleatoriamente alguns dos negócios em que ele trabalhou no ano passado para que possa analisá-los mais profundamente. Antes de começar a selecionar os negócios, você deve primeiro descobrir quais são as chances de selecionar determinados negócios.

Lembre-se de que a probabilidade de um evento pode ser calculada por $$ P(\text{event}) = \frac{\text{# ways event can happen}}{\text{total # of possible outcomes}} $$

pandas como pd e numpy como np estão carregados; amir_deals está disponível.

Este exercicio faz parte do curso

Introdução à estatística em Python

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# Count the deals for each product
counts = ____
print(counts)

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Este exercicio faz parte do curso

Introdução à estatística em Python

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Summary statistics gives you the tools you need to boil down massive datasets to reveal the highlights. In this chapter, you'll explore summary statistics including mean, median, and standard deviation, and learn how to accurately interpret them. You'll also develop your critical thinking skills, allowing you to choose the best summary statistics for your data.

Exercise 1: What is statistics?Exercise 2: Descriptive and inferential statistics Exercise 3: Data type classification Exercise 4: Measures of center Exercise 5: Calculating mean and median Exercise 6: Mean, median, and distribution shape Exercise 7: Measures of spread Exercise 8: Variance and standard deviation Exercise 9: Quartiles, quantiles, and quintiles Exercise 10: Finding outliers using IQR

In this chapter, you'll learn how to generate random samples and measure chance using probability. You'll work with real-world sales data to calculate the probability of a salesperson being successful. Finally, you’ll use the binomial distribution to model events with binary outcomes.

Exercise 1: Quais são as chances?Exercise 2: Com ou sem reposição?Exercise 3: Cálculo de probabilidades

Exercicio Atual

Exercise 4: Amostragem de negócios Exercise 5: Distribuições discretas Exercise 6: Criação de uma distribuição de probabilidade Exercise 7: Identificação de distribuições Exercise 8: Valor esperado vs. média da amostra Exercise 9: Distribuições contínuas Exercise 10: Qual distribuição?Exercise 11: Backups de dados Exercise 12: Simulação de tempos de espera Exercise 13: A distribuição binomial Exercise 14: Simulação de negócios de vendas Exercise 15: Cálculo de probabilidades binomiais Exercise 16: Quantas vendas serão realizadas?

It’s time to explore one of the most important probability distributions in statistics, normal distribution. You’ll create histograms to plot normal distributions and gain an understanding of the central limit theorem, before expanding your knowledge of statistical functions by adding the Poisson, exponential, and t-distributions to your repertoire.

Exercise 1: The normal distribution Exercise 2: Distribution of Amir's sales Exercise 3: Probabilities from the normal distribution Exercise 4: Simulating sales under new market conditions Exercise 5: Which market is better?Exercise 6: The central limit theorem Exercise 7: Visualizing sampling distributions Exercise 8: The CLT in action Exercise 9: The mean of means Exercise 10: The Poisson distribution Exercise 11: Identifying lambda Exercise 12: Tracking lead responses Exercise 13: More probability distributions Exercise 14: Distribution dragging and dropping Exercise 15: Modeling time between leads Exercise 16: The t-distribution

In this chapter, you'll learn how to quantify the strength of a linear relationship between two variables, and explore how confounding variables can affect the relationship between two other variables. You'll also see how a study’s design can influence its results, change how the data should be analyzed, and potentially affect the reliability of your conclusions.

Exercise 1: Correlation Exercise 2: Guess the correlation Exercise 3: Relationships between variables Exercise 4: Correlation caveats Exercise 5: What can't correlation measure?Exercise 6: Transforming variables Exercise 7: Does sugar improve happiness?Exercise 8: Confounders Exercise 9: Design of experiments Exercise 10: Study types Exercise 11: Longitudinal vs. cross-sectional studies Exercise 12: Congratulations!