Highlight four ways in which application packages could enhance the efficiency of a business firm

Identify ways in which an organization could minimize unauthorized access to data in its computerized information systems.

Outline the methods used to detect data access in computerized information systems.

 

 

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Neural Net Evolution. A neural net typically starts out with random weights; hence it produces essentially random predictions in the first iteration. Describe how the neural net evolves (in JMP) to produce a more accurate prediction? Car Sales. Consider again the data on used cars ( ) with 1436 records and details on 38 attributes, including Price, Age, KM, HP, and other specifications. The goal is to predict the price of a used Toyota Corolla based on its specifications. a. Determine which variables to include, and use the neural platform in JMP Pro to fit a model. Use the validation column for validation, and use the default values in the Neural model launch dialog. Record the RMSE for the training data and the validation data, and save the formula for the model to the data table (use the Save Fast Formulas option, which will save the formula as one column in the data table). Repeat the process, changing the number of nodes (and ouly this) to 5, 10, and 25. i. Using your recorded values, what happens to the RMSE for the training data as the number of nodes increases? ii. What happens to the RMSE for the validation data? iii. Comment on the appropriate number of nodes for the model. iv. Use the Model Comparison platform to compare these four models (use the Validation column as either aByvariable or as a Group variable, and focus only on the validation data). Here, RASE is reported rather than RMSE. Compare RASE and AAE (average absolute error) values for these four models. Which model has the lowest “error”? b. Conduct a sintilar experiment to assess the effect of changing the number oflayers in the network as well as the activation functions.

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