Which of these strategic elements exists at a higher level than the others?

Conventional surveys and focus groups are called ________ because they provide a slice of life at one point in time

A) segmentation studies B) tracking studies C) time-series data D) cross-sectional data

If the outcomes of a variable follow a Poisson distribution, then their

A) median equals the variance. B) mean equals the standard deviation. C) median equals the standard deviation. D) mean equals the variance.