Nilai harapan vs. rataan sampel

Aplikasi di sebelah kanan akan mengambil sebuah sampel dari sebaran uniform diskret, yang mencakup angka 1 sampai 9, dan menghitung rataan sampelnya. Anda dapat menyesuaikan ukuran sampel menggunakan penggeser. Perhatikan bahwa nilai harapan dari sebaran ini adalah 5.

Diambil sebuah sampel, dan Anda memenangkan dua puluh dolar jika rataan sampel kurang dari 4. Ada syaratnya: Anda boleh memilih ukuran sampelnya.

Ukuran sampel mana yang paling mungkin membuat Anda memenangkan dua puluh dolar?

Latihan ini adalah bagian dari kursus

Pengantar Statistika di Python

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Latihan ini adalah bagian dari kursus

Pengantar Statistika di Python

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Mulai Kursus Gratis

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: Seberapa besar kemungkinannya?Exercise 2: Dengan atau tanpa pengembalian?Exercise 3: Menghitung probabilitas Exercise 4: Mengambil sampel transaksi Exercise 5: Distribusi diskret Exercise 6: Membuat distribusi probabilitas Exercise 7: Mengidentifikasi distribusi Exercise 8: Nilai harapan vs. rataan sampel

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Exercise 9: Distribusi kontinu Exercise 10: Distribusi yang mana?Exercise 11: Pencadangan data Exercise 12: Mensimulasikan waktu tunggu Exercise 13: Distribusi binomial Exercise 14: Mensimulasikan kesepakatan penjualan Exercise 15: Menghitung probabilitas binomial Exercise 16: Berapa banyak penjualan yang akan dimenangkan?

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!