Research question	Is the mean total strike reported for the past decade (2010 to 2020) equal to 10,000? Test at?= 0.05 significance level.
Hypotheses	H0:? =10,000 H1:? ?10,000 In words, Null: The mean total strike is equal to 10,000. Alternative: The mean total strike is different than 10,000.
Critical value/s	Based on the information provided, the significance level is?= 0.05, and the critical value for a two-tailed test are 2.228, -2.228.
Test statistic	+/- 4.05
Decision	Since it is observed that the test statistic is greater than the critical value, |t| = 4.05 > tc = 2.228, it is then concluded that the null hypothesis is REJECTED.
Conclusion	Therefore, there is enough evidence to conclude that the mean total strike reported for the past decade (2010 to 2020) is different than 10,000, at the?= 0.05 significance level.

Based on this data and conclusion, Can I say that the frequency of bird strikes increased from 2010 to 2020? Or all we know is that the mean total strike reported during the past decade is just different than 10,000?

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%