Quantitative Problem

Questions

(1) explain in detail what each of them do.  
• Descriptive Measures
• Probability
• Sampling Distributions
• Linear Regression
• Time Series Forecasting
• Index Numbers
• Decision Making

(2) explain the advantages and disadvantages each of them have if they are attempted to be used by a finance department to forecast the sales budget for the coming year.
(3) identify (with reasons) which technique is most appropriate to undertake the task proposed above by the finance department.

Note: The reference should be given for the questions asked so that verification of the correctness can be made.