Greetings. I am a beginner level user in Excel and am doing a paper for my Master's Degree. I have followed a tutorial video for how to use the Data Analysis tool in Excel by using the 2 Sample t-Test. My problem occurs after selecting my ranges. As you can see in my screenshots that I tried arranging them vertically and horizontally with the same result. Would be grateful to whoever can tell me what I need to differently. Of course it works perfectly in the tutorial video but I am obviously missing something somewhere. Thank you!