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Artificial intelligence and machine learning are frontiers in the technology field.

INSTRUCTIONS TO CANDIDATES
ANSWER ALL QUESTIONS

Artificial intelligence and machine learning are frontiers in the technology field. These areas are often used to address common problems that require difficult tools or skills. AI and ML professionals work with SQL, R, Python, and other tools specific to data science. Different algorithms are used to solve problems and choosing the correct algorithm can be challenging. This project will use Azure Machine Learning, which is a cloud-based service from Microsoft. Azure ML allows you to create and run experiments based on datasets and integrate custom code in SQL, R, or Python. 

 

Module 8: Your Own Analysis

 

Objectives

Develop your own analysis.

Predict the consumer reports rating on cereal based on the data given.

Scenario

Kaggle.com contains a variety of datasets for experimentation. One such dataset is the 80-cereals dataset. This dataset contains the consumer reports rating of several different cereals along with various data about the cereals. The dataset contains the following fields.

Content

Fields in the Dataset

Name: Name of cereal

mfr: Manufacturer of cereal

o A = American Home Food Products

o G = General Mills

o K = Kellogg’s

o N = Nabisco

o P = Post

o Q = Quaker Oats

o R = Ralston Purina

Type:

o Cold

o Hot

Calories: Calories per serving

Protein: Grams of protein

Fat: Grams of fat

Sodium: Grams of sodium (Note: The original data contains milligrams.)

Fiber: Grams of dietary fiber

Carbs: Grams of complex carbohydrates

Sugars: Grams of sugars

Potassium: Grams of potassium (Note: The original data contains milligrams.)

Vitamins: Vitamins and minerals: 0, 25, or 100, indicating the typical percentage of FDA recommended

Shelf: Display shelf (1, 2, or 3, counting from the floor)

Weight: Weight in ounces of one serving

Cups: Number of cups in one serving

Rating: A rating of the cereals

 

Create a new experiment in Azure Machine Learning and perform linear regression on the cereals.csv dataset. We are seeking to determine if we can predict the rating based on the above features. The ratings are based on nutrition and taste. Open the cereals.csv file and look through the data to familiarize yourself with the data. You will need to cleanse the data—are there any missing values? Any outliers? Do you need to make any fields categorical? You will also need to normalize the data. You will want to develop python visualizations (feel free to use the code we have used in previous examples to create a pairwise scatter plot). You may also want to focus on a few selected fields based on your visualizations (sugar, calories, fat, fiber, etc). Don’t forget to split the data into a training and test set. You will need to create a linear regression model, train the model, score the model, and then evaluate it. 

How accurate is your model? What is the R2 value?

Look at the python pairwise scatter plot. What features do you want to remove from the model? Continue iterating (removing features and adding them back in) and reviewing the evaluation results. Find the best R2 value you can. Try to get above 0.70. What features are good predictors of the cereal rating?

 

 

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