what is a problem with a single observation in data science? why different price values difference between economic model and correlation analysis and regression different price how can i determine if a price is the same for an element? how are the same observation for each item in a data set how to find the difference between an element in a database and a data set how to do multiple observation in r how to analyze multiple observations how many observations can an element have how to treat multiple observations in an array when does a graph show price based on a specific data set when do you have multiple observations? how to do correlation analysis with a machine how to treat multiple observations what is the difference between technical and non technical data what is the problem when data has multiple observations? why do we get multiple observation for each element, even if there is no correlation? what are the differences between technical and nontechnical data? when comparing different elements of data in regression what is the price?