How can I use the cross-validation to assess the performance of my churn prediction model?

In the context of data science, you can address this particular issue by using cross-validation in machine learning by using the simple steps which are given below:-

Import libraries

You can start by importing the required libraries for data manipulation, model training, and evaluation.

Import pandas as pd

From sklearn.model_selection import train_test_split, cross_val_score

From sklearn.pipeline import make_pipeline

From sklearn.preprocessing import StandardScaler

From sklearn.linear_model import LogisticRegression

Load and prepare data

Now you can load the data set which contains the customer information and then you can split it into training and testing sets.

# Load dataset (assuming df is the DataFrame containing the data)

# X contains features, y contains target variable (churn)

X = df.drop(columns=[‘churn’])

Y = df[‘churn’]

# Split data into training and testing sets

X_train, X_test, y_train, y_test = train_test_split(X, y, test_size=0.2, random_state=42)

Define model pipeline

Now you should create a model pipeline that includes the machine learning model itself.

# Create a pipeline with data preprocessing and model

Model_pipeline = make_pipeline(StandardScaler(), LogisticRegression())

Cross-validation

Perform crow validation to assess the model performance on multiple training splits of the data.

# Perform cross-validation with 5 folds

Cv_scores = cross_val_score(model_pipeline, X_train, y_train, cv=5, scoring=’accuracy’)

Evaluate performance

Now you can compute the mean cross-validation score so that you can score to evaluate the model's generalization performance.

# Compute mean cross-validation score

Mean_cv_score = cv_scores.mean()

Print(“Mean Cross-Validation Accuracy:”, mean_cv_score)