My research question will be "Did the frequency of bird strikes in the aviation industry decrease in the aviation industry from 2010 to 2020?".

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.)
• 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?

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%