Researchers wondered if during the week of the switch to Daylight Savings time is linked to traffic accidents. They analyzed a sample of 732,835 randomly chosen accident records collected between 1996 and 2017 and found a six percent increase in traffic accidents every year during the week of Daylight Savings time. The short-term increase also tracked with the switch to Daylight Savings time from the second Sunday of March to the first Sunday of Apri in 2007.

a) The sample for this study is:

b) The population for this study is:

c) Is this an experimental study or an observational study? Explain.

d) A statistic from this study is:

e) What is the explanatory variable for this study?

f) What is the response variable for this study?