Chance (Fall 2004) published a study on modeling a certain pitch of a musical composition. Data on 147 famous compositions were used to model the number of times (y) a certain pitch occurs called entropy- as a straight-line function of year of birth (x) of the composer. On the basis of the scatterplot of the data, the standard deviation \(\sigma \sigma\) of the model is estimated to be \(s = .1\). For a given year (x), about 95% of the actual entropy values (y) will fall within d units of their predicted values. Find the value of d.
What are the data modeling concepts used in MongoDB? What are the main CRUD operations of MongoDB?