My research question will be "Did the frequency of bird strikes in the aviation industry decrease from 2010 to 2020?". (It can be changed if you have another idea for it)

What Hypothesis Statements should be...?

H null:

H a:

My questions will be...

• What statistical test, exactly, will you use? For example, a t-test of independent means, (Z-test, T-test, Chi-Square test,.. etc. and If possible, I would like to use total strikes reported numbers only so I can make this analysis simpler) or It is okay to use both data (total strikes reported and damaging strikes reported).
• Why did you choose this test?
• What assumptions are you making in order to use this test?
• What is the confidence interval that you will use?

What is the conclusion would be..? (How can I interpret it..?

Percentage Damaging strikes damaging Year Total strikes strikes vs. total reported reported strikes 2010 9,889 595 6.0% 2011 10,104 542 5.4% 2012 10,903 613 5.6% 2013 11,406 609 5.3% 2014 13,683 587 4.3% 2015 13,788 622 4.5% 2016 13,353 589 4.4% 2017 14,788 667 4.5% 2018 16,222 708 4.4% 2019 17,358 739 4.3% 2020 11,605 462 4.0%