independent sample t-test

ut i've read you need to have 3 categories at least for this ?

Hi, I am working on the below raw data and want to compare between control group vs various amino acid concentration level. I know, I can use T-Test to compare control vs each concentration level. Besides, the data is following normal distribution. The data is measured up to 10 days...

One variable is injuries yes/no, the other variable is rating how much in control they felt (0=none,100=total). Basically if injuries causes low levels of perceived control. I have to use a t-test, but there are so many and I really don't know which one.

I'm trying to better understand something conceptually, and was hoping if a few users might be able to explain it I could understand it better. For the calculations of a test statistics for an independent sample t test, the mean of sample 2 is subtracted from the mean of sample 1 (then 0 is...

Hello folks! I'm having a hard time understanding the output that SPSS gave me regarding my Independent Samples t-Test. Can anyone help me describe this output? I've attached the output for you.

I am conducting a psychology experiment. In my pilot study I analyze responses of one subject which ran through two conditions. The task is to predict outcomes based on previous outcomes. On every trial the subject tries to predict the outcome as good as possible and learns to adapt the...

Hi, I have a data set with two questions: - whether one visits coffee chains or independent coffee stores - results are set within 1 (chains) and 2 (independent) --- (for which I have 106 for chains and 24 for independents equalling a total of 130 responses) - whether these locations have a...

Hi all! One basic question I hope you can answer. I would really appreciate it :D:D I have to columns of data. Both are daily returns (scale variable). The second column does not containt as many observations as column 1. e.g column 1 column 2 0,2%...