1.To test whether 2 sets of data have the same average, one option is to use paired data, if those are available. We then use the average and the standard deviation of the differences to conduct the test

2.In a discret Bayesian experiment with 5 samples, there are six possible outcomes for a given probability, and each outcome has its own probability

3.If we are estimating the standard deviation for an xbar chart with the standard deviation of the samples, we correct with a cn factor

My answer is TTF.Am i doing it right? need explanation for the question which I did wrong.