Question: Are the following data time series? If not, explain why. a) Quarterly earnings of Microsoft Corp. b) Unemployment in August 2010 by education level. c)

Are the following data time series? If not, explain why.
a) Quarterly earnings of Microsoft Corp.
b) Unemployment in August 2010 by education level.
c) Time spent in training by workers in NewCo.
d) Numbers of e-mails sent by employees of SynCo each hour in a single day.

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