Researchers examined the bill color (in hue degree) of male and female zebra finches. Here are the summary statistics from the study.

Sex N X S

Male 19 2.91 0.59

Female 6 7.42 1.02

Do male and female zebra finches differ in their bill color, at a 1% level of significance? Let = (, ) 1. Use the above information to answer questions 18 - 22. 18. What is the null hypothesis? 19. What is the alternative hypothesis? 20. What is the test statistic?21. What is the critical value? 22. What is the 2-part conclusion? Show work.