A _____ is the primary key of one table that has been placed into another table to create a common attribute

Identify two supply chain models. Which is better?

What will be an ideal response?

Confidence intervals should be used with caution with time-series data because ________

A) it's difficult to keep track of the time for each sample B) measuring the variance of time-series data is not possible C) the mean and/or variance of time-series data are not stationary D) it's difficult to measure the mean and/or variance of time-series data