Economic statistics

1. Describe the economical content of the cumulative frequency if you analyze time series. 2. Statistical observation — economical mean, basic steps of performing the statistical observation. 3. Explain economical and statistical content of the components of next regression equation: Y = a ± px + e. 40. Statistical observation — economical mean, kinds of statistical observation. 4. Describe the economical difference between individual and aggregate indexes. 49. National welfare - definition, structure, statistical indexes