Oefenen met aggregaties

Het is tijd om de in-app-aankoopgegevens gedetailleerder te verkennen. Hier ga je oefenen met het aggregeren van de gegevensset op verschillende manieren met de methode .agg() en vervolgens de resultaten bekijken om gevoel te krijgen voor de data in het algemeen en voor het aggregeren met pandas.

Er is een DataFrame voor je geladen met de naam purchase_data. Dit is de gegevensset met in-app-aankoopgegevens, samengevoegd met de gebruikersdemografische gegevens van eerder.

Voordat je begint, is het goed om dit purchase_data DataFrame te verkennen in de IPython-shell. Let daarbij vooral op de kolom price: die bekijk je in deze oefening verder.

Deze oefening maakt deel uit van de cursus

Customer Analytics and A/B Testing in Python

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Praktische interactieve oefening

Probeer deze oefening eens door deze voorbeeldcode in te vullen.

# Calculate the mean purchase price 
purchase_price_mean = purchase_data.price.agg('____')

# Examine the output 
print(purchase_price_mean)

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Deze oefening maakt deel uit van de cursus

Customer Analytics and A/B Testing in Python

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This chapter provides a brief introduction to the content that will be covered throughout the course before transitioning into a discussion of Key Performance Indicators or KPIs. You'll learn how to identify and define meaningful KPIs through a combination of critical thinking and leveraging Python tools. These techniques are all presented in a highly practical and generalizable way. Ultimately these topics serve as the core foundation for the A/B testing discussion that follows.

Exercise 1: Cursusintroductie en overzicht Exercise 2: De belangrijkste onderdelen van een A/B-test begrijpen Exercise 3: Betekenisvolle KPI’s definiëren Exercise 4: KPI's identificeren en begrijpen Exercise 5: Onze data laden en verkennen Exercise 6: Mergen op verschillende sets velden Exercise 7: Verkennende analyse van KPI's Exercise 8: Oefenen met aggregaties

Huidige oefening

Exercise 9: Groeperen & aggregeren Exercise 10: KPI’s berekenen - een praktisch voorbeeld Exercise 11: KPI's berekenen Exercise 12: Gemiddelde aankoopprijs per cohort

This chapter teaches you how to visualize, manipulate, and explore KPIs as they change over time. Through a variety of examples, you'll learn how to work with datetime objects to calculate metrics per unit time. Then we move to the techniques for how to graph different segments of data, and apply various smoothing functions to reveal hidden trends. Finally we walk through a complete example of how to pinpoint issues through exploratory data analysis of customer data. Throughout this chapter various functions are introduced and explained in a highly generalizable way.

Exercise 1: Working with time series data in pandas Exercise 2: Parsing dates Exercise 3: Creating time series graphs with Matplotlib Exercise 4: Plotting time series data Exercise 5: Pivoting our data Exercise 6: Examining the different cohorts Exercise 7: Understanding and visualizing trends Exercise 8: Seasonality and moving averages Exercise 9: Exponential rolling average & over/under smoothing Exercise 10: Events and releases Exercise 11: Visualizing user spending Exercise 12: Looking more closely at revenue

In this chapter you will dive fully into A/B testing. You will learn the mathematics and knowledge needed to design and successfully plan an A/B test from determining an experimental unit to finding how large a sample size is needed. Accompanying this will be an introduction to the functions and code needed to calculate the various quantities associated with a statistical test of this type.

Exercise 1: Introduction to A/B testing Exercise 2: Good applications of A/B testing Exercise 3: General properties of an A/B Test Exercise 4: A/B test generalizability Exercise 5: Initial A/B test design Exercise 6: Experimental units: Revenue per user day Exercise 7: Preparing to run an A/B test Exercise 8: Conversion rate sensitivities Exercise 9: Sensitivity Exercise 10: Standard error Exercise 11: Calculating sample size Exercise 12: Exploring the power calculation Exercise 13: Calculating the sample size

After running an A/B test, you must analyze the data and then effectively communicate the results. This chapter begins by interleaving the theory of statistical significance and confidence intervals with the tools you need to calculate them yourself from the data. Next we discuss how to effectively visualize and communicate these results. This chapter is the culmination of all the knowledge built over the entire course.

Exercise 1: Analyzing the A/B test results Exercise 2: Confirming our test results Exercise 3: Thinking critically about p-values Exercise 4: Understanding statistical significance Exercise 5: Intuition behind statistical significance Exercise 6: Checking for statistical significance Exercise 7: Understanding confidence intervals Exercise 8: Calculating confidence intervals Exercise 9: Interpreting your test results Exercise 10: Plotting the distribution Exercise 11: Plotting the difference distribution Exercise 12: Finale