question archive Problem 1: Clustering A leading bank wants to develop a customer segmentation to give promotional offers to its customers
Problem 1: Clustering A leading bank wants to develop a customer segmentation to give promotional offers to its customers
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Problem 1: Clustering
A leading bank wants to develop a customer segmentation to give promotional offers to its customers. They collected a sample that summarizes the activities of users during the past few months. You are given the task to identify the segments based on credit card usage.
1.1 Read the data, do the necessary initial steps, and exploratory data analysis (Univariate, Bi-variate, and multivariate analysis).
1.2 Do you think scaling is necessary for clustering in this case? Justify
1.3 Apply hierarchical clustering to scaled data. Identify the number of optimum clusters using Dendrogram and briefly describe them
1.4 Apply K-Means clustering on scaled data and determine optimum clusters. Apply elbow curve and silhouette score. Explain the results properly. Interpret and write inferences on the finalized clusters.
1.5 Describe cluster profiles for the clusters defined. Recommend different promotional strategies for different clusters.
Dataset for Problem 1: bank_marketing_part1_Data.csv
Data Dictionary for Market Segmentation:
- spending: Amount spent by the customer per month (in 1000s)
- advance_payments: Amount paid by the customer in advance by cash (in 100s)
- probability_of_full_payment: Probability of payment done in full by the customer to the bank
- current_balance: Balance amount left in the account to make purchases (in 1000s)
- credit_limit: Limit of the amount in credit card (10000s)
- min_payment_amt : minimum paid by the customer while making payments for purchases made monthly (in 100s)
- max_spent_in_single_shopping: Maximum amount spent in one purchase (in 1000s)
Problem 2: CART-RF-ANN
An Insurance firm providing tour insurance is facing higher claim frequency. The management decides to collect data from the past few years. You are assigned the task to make a model which predicts the claim status and provide recommendations to management. Use CART, RF & ANN and compare the models' performances in train and test sets.
2.1 Read the data, do the necessary initial steps, and exploratory data analysis (Univariate, Bi-variate, and multivariate analysis).
2.2 Data Split: Split the data into test and train, build classification model CART, Random Forest, Artificial Neural Network
2.3 Performance Metrics: Comment and Check the performance of Predictions on Train and Test sets using Accuracy, Confusion Matrix, Plot ROC curve and get ROC_AUC score, classification reports for each model.
2.4 Final Model: Compare all the models and write an inference which model is best/optimized.
2.5 Inference: Based on the whole Analysis, what are the business insights and recommendations
Dataset for Problem 2: insurance_part2_data-1.csv
Attribute Information:
1. Target: Claim Status (Claimed)
2. Code of tour firm (Agency_Code)
3. Type of tour insurance firms (Type)
4. Distribution channel of tour insurance agencies (Channel)
5. Name of the tour insurance products (Product)
6. Duration of the tour (Duration)
7. Destination of the tour (Destination)
8. Amount of sales of tour insurance policies (Sales)
9. The commission received for tour insurance firm (Commission)
10. Age of insured (Age)
Please find below scoring criteria:
Scoring guide (Rubric) - Project - Data Mining
| Criteria | Points |
|---|---|
1.1 Read the data and do exploratory data analysis (4 pts). Describe the data briefly. Interpret the inferences for each (3 pts). Initial steps like head() .info(), Data Types, etc . Null value check. Distribution plots(histogram) or similar plots for the continuous columns. Box plots, Correlation plots. Appropriate plots for categorical variables. Inferences on each plot. Summary stats, Skewness, Outliers proportion should be discussed, and inferences from above used plots should be there. There is no restriction on how the learner wishes to implement this but the code should be able to represent the correct output and inferences should be logical and correct. |
7 |
1.2 Do you think scaling is necessary for clustering in this case? Justify The learner is expected to check and comment about the difference in scale of different features on the bases of appropriate measure for example std dev, variance, etc. Should justify whether there is a necessity for scaling and which method is he/she using to do the scaling. Can also comment on how that method works. |
3 |
1.3 Apply hierarchical clustering to scaled data (3 pts). Identify the number of optimum clusters using Dendrogram and briefly describe them (4.5). Students are expected to apply hierarchical clustering. It can be obtained via Fclusters or Agglomerative Clustering. Report should talk about the used criterion, affinity and linkage. Report must contain a Dendrogram and a logical reason behind choosing the optimum number of clusters and Inferences on the dendrogram. Customer segmentation can be visualized using limited features or whole data but it should be clear, correct and logical. Use appropriate plots to visualize the clusters. |
7.5 |
1.4 Apply K-Means clustering on scaled data and determine optimum clusters (2 pts). Apply elbow curve and silhouette score (3 pts). Interpret the inferences from the model (2.5 pts). K-means clustering code application with different number of clusters. Calculation of WSS(inertia for each value of k) Elbow Method must be applied and visualized with different values of K. Reasoning behind the selection of the optimal value of K must be explained properly. Silhouette Score must be calculated for the same values of K taken above and commented on. Report must contain logical and correct explanations for choosing the optimum clusters using both elbow method and silhouette scores. Append cluster labels obtained from K-means clustering into the original data frame. Customer Segmentation can be visualized using appropriate graphs. |
7.5 |
1.5 Describe cluster profiles for the clusters defined (2.5 pts). Recommend different promotional strategies for different clusters in context to the business problem in-hand (2.5 pts ). After adding the final clusters to the original dataframe, do the cluster profiling. Divide the data in the finalyzed groups and check their means. Explain each of the group briefly. There should be at least 3-4 Recommendations. Recommendations should be easily understandable and business specific, students should not give any technical suggestions. Full marks will only be allotted if the recommendations are correct and business specific. variable means. Students to explain the profiles and suggest a mechanism to approach each cluster. Any logical explanation is acceptable. |
5 |
2.1 Read the data and do exploratory data analysis (4 pts). Describe the data briefly. Interpret the inferences for each (2 pts). Initial steps like head() .info(), Data Types, etc . Null value check. Distribution plots(histogram) or similar plots for the continuous columns. Box plots, Correlation plots. Appropriate plots for categorical variables. Inferences on each plot. Summary stats, Skewness, Outliers proportion should be discussed, and inferences from above used plots should be there. There is no restriction on how the learner wishes to implement this but the code should be able to represent the correct output and inferences should be logical and correct. |
6 |
2.2 Data Split: Split the data into test and train (1 pts), build classification model CART (2 pts), Random Forest (2 pts), Artificial Neural Network(2 pts). Object data should be converted into categorical/numerical data to fit in the models. (pd.categorical().codes(), pd.get_dummies(drop_first=True)) Data split, ratio defined for the split, train-test split should be discussed. Any reasonable split is acceptable. Use of random state is mandatory. Successful implementation of each model. Logical reason behind the selection of different values for the parameters involved in each model. Apply grid search for each model and make models on best_params. Feature importance for each model. |
7 |
2.3 Performance Metrics: Check the performance of Predictions on Train and Test sets using Accuracy (1.5 pts), Confusion Matrix (2 pts), Plot ROC curve and get ROC_AUC score for each model (2 pts), Make classification reports for each model. Write inferences on each model (2 pts). Calculate Train and Test Accuracies for each model. Comment on the validness of models (overfitting or underfitting) Build confusion matrix for each model. Comment on the positive class in hand. Must clearly show obs/pred in row/col Plot roc_curve for each model. Calculate roc_auc_score for each model. Comment on the above calculated scores and plots. Build classification reports for each model. Comment on f1 score, precision and recall, which one is important here. |
7.5 |
2.4 Final Model - Compare all models on the basis of the performance metrics in a structured tabular manner (3 pts). Describe on which model is best/optimized (1.5 pts ). A table containing all the values of accuracies, precision, recall, auc_roc_score, f1 score. Comparison between the different models(final) on the basis of above table values. After comparison which model suits the best for the problem in hand on the basis of different measures. Comment on the final model. |
4.5 |
2.5 Based on your analysis and working on the business problem, detail out appropriate insights and recommendations to help the management solve the business objective. There should be at least 3-4 Recommendations and insights in total. Recommendations should be easily understandable and business specific, students should not give any technical suggestions. Full marks should only be allotted if the recommendations are correct and business specific. |
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