(1) Teacher, I had a question to no. 10 on page 109. I wanted to know if i can say that 'there was a correlation between taking mindfulnesss seminar and improvement in stress related symptoms' as a conclusion to the observational study. Thank you!

(2) Teacher, I also had a question for no. 14 on page 111. Why does it say that Utah's federal taxes was collected in 2014, and not in 2013? Is it because the tax is collected the following year? I became confused with the tax system! Thank you!