You have been working in Excel to find descriptive statistics, now let’s explore how to compare means. You will need to utilize the Excel spreadsheet with your descriptives from your M1.5 assignment.When comparing means, we would like to know if they are significantly different. Keeping in mind that your data in your spreadsheet gives three different groups of data, one for 2017, 2018, and 2019, simple comparisons of means procedures typically only cover two means. Running multiple tests is not ideal, but for our purposes, let’s examine the independent-t procedure. Simply put, in this case we have the following:Research Question and HypothesesResearch QuestionIs there a significant difference in the number of accidental overdose deaths in Montgomery County in 2017 and 2018?Research/Alternative HypothesisThere is a significant difference in the number of accidental overdose deaths in Montgomery County for 2017 and 2018.Null HypothesisThere is no significant difference in the number of accidental overdose deaths in Montgomery County for 2017 and 2018.Why might we want to explore this? Perhaps we have implemented a solution to the problem and want to see if it was effective. Maybe we just want to see if there is a difference so we can begin to look for variables that might have impacted the change. Regardless, an independent-t test can tell us if two means are significantly different.Please review the video above on how to run an independent-t test in Excel. The Excel website in your Lifeline can help as well.
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