# A sample of n = 20 scores is transformed in to z-scores. The mean for the 20 z-scores is ____? If a researcher reports t(18) = 1.30, p > .05 for a two-sample independent-measures experiment, the results were significant. T or F?

A sample of n = 20 scores is transformed in to z-scores. The mean for the 20 z-scores is ____?
If a researcher reports $t\left(18\right)=1.30,p>.05$ for a two-sample independent-measures experiment, the results were significant. T or F?
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Preston Buckley
Since you have asked multiple questions, we will solve the first question for you. If you want any specific question to be solved then please specify the question number or post only that question.
The z-score is the standard normal variable that has the mean of 0 and standard deviation of 1. Any of the values that are transformed to z-scores would have a mean of 0.

Thus, the sample of n = 20 scores is transformed in to z-scores. The mean for the 20 z-scores is 0.