1.

Collect a dataset of products from a shopping website (e.g. Amazon). A record describing this product should include the unit price, degree of ratings, product name, and product category (4 columns in total, include at least 2 categories). The dataset should have at least 50 records (rows). (1). Calculate the average price and variance in each product category. (2). Plot a histogram chart of products of rating levels, the bin ranges from 3 to 5 with the width of 0.2.