This week's graded assignment is an application of the independent samples ttest, whichinvolves analyzing data acquired from a single variable and two independent groups. Theapplication involves comparing the mean number of bird strikes recorded at U.S. airports, andthe group membership variable is airport location: landside vs. waterside. The data for thisassignment are located in the Excel file "Bird Strike Data." You are to import this data set intoyourstatisticalsoftware programanddothefollowing(see"GuidedExample2"document)

1. Pre-DataAnalysis
   1. What is the research question? What are your operational definitions for landside andwatersideairports?
   2. What is the corresponding research methodology/design and why is this methodologyappropriate?
   3. Conduct an a priori power analysis to determine the minimum sample size needed. Is thegiven data set sufficient relative to this minimum sample size? In what way do you thinkthesizeof the given samplewillimpact the results?

1. DataAnalysis

Usingthe data fromthe Excel file,conduct a hypothesisas follows:

1. Formulatethenullandalternativehypothesesinsymbolsandwords.
2. Determinethetestcriteria.
3. Test for the assumptions of independent samples ttest and indicate if you will use thepooledvariance t, separatevariancest, or Welch's t,and why.
4. Run the analysis and record the results.
5. Make a decision to reject or fail to reject the null hypothesis and write a concludingstatement.

1. Post-DataAnalysis
   1. Determineandinterprettheestimatedeffect size,d.
   2. Determineandinterpretthepowerofthestudy.
   3. Determineandinterpretthe95%confidenceinterval.
   4. Presentatleast threeplausibleexplanations fortheresults.