1. Particulate matter 2.5 (PM2.5) data were collected every hour for 6 weeks in Los Angeles and New York City. Assume that the PM2.5 data are continuous and normally distributed. Match the research question to the appropriate test of significance.

- A. B. C.	Is the mean PM2.5 level in Los Angeles the same as the mean PM2.5 level in New York City?
- A. B. C.	Is the mean PM2.5 level in New York City the same on all 7 days of the week?

A.	Chi-square test
B.	F-test
C.	t-test