
Explain and calculate measures of central tendency and dispersion; create and interpret frequency tables and charts (histogram, pie chart, box plot); analyze relationships with scatter plots, line graphs, correlation coefficients.
Access the practice notebook containing all the example code used in this course, with the Jupyter notebook linked in the description below.
Learn statistical data analysis with python by exploring univariate and multivariate techniques, exploratory data analysis, and the fundamentals of linear regression assumptions to determine variable relationships.
Explore univariate analysis of a single variable using frequency tables, bar charts, histograms, pie charts, and box plots, measuring central tendency and dispersion.
Visualize discrete category comparisons with bar charts in Python by plotting a frequency table with kind='bar' to show the distribution of savings account categories such as little, moderate, and rich.
Explore how histograms visualize the distribution of numerical data in Python with Matplotlib, learn to set bins, interpret duration distributions, and identify right skew.
Analyze a frequency table to count occurrences in a categorical variable such as gender using Pandas value_counts. Assess distribution and data balance by comparing counts for male and female categories.
Learn how to create a Python pie chart to show the distribution of a categorical variable, using a frequency table and Matplotlib, and compare its usefulness to other charts.
Explore how box plots, built with seaborn, reveal distribution, skewness, and dispersion by visualizing the median, quartiles, whiskers, and outliers for a credit dataset's duration.
Explore measures of central tendency: mean, median, and mode, and learn to compute them with pandas in Python, using an age dataset to obtain mean 36, median 33, and mode 27.
By the end of this course, you will have achieved the following learning outcomes:
I can explain and calculate the importance of measures of central tendency.
I can explain and calculate the importance of measures of dispersion.
I can identify the relative strengths and weaknesses of the measures of tendency.
I can identify the relative strengths and weaknesses of the measures of dispersion.
I can create and interpret a histogram, a bar chart, a box plot, and a frequency table.
I can identify and describe scatter plots and line graphs to determine the relationships between two variables.
I can calculate and interpret the Pearson correlation coefficient to determine the relationships between two variables.
These are some of the basics statistical data analysis techniques that you will get to use while working on data science projects. For example, in order to check for model assumptions while working on a predictive solution, you will need to apply the above techniques i.e. to test for normality of variables in a dataset, you can plot a histogram or a pair plot, to check for correlation, you can calculate the Pearson correlation coefficient etc.
In addition, these techniques will also be important while also working on data analysis projects where the creation of a descriptive analysis report will be a necessity.