PROBLEMS deviation . a standard deviation of s = 12 . of a 2 - score for a hypothesis test ?

Please I would like to help question 1 chapter 9 problem solve thanks!

PROBLEMSdeviation .a standard deviation of s = 12 .of a 2 - score for a hypothesis test ?\6. Compute the estimated standard error for the1 . \ Under what circumstances is a t statistic used instead12 . A sample of n = 16 scores has a mean of M = 56 and2 . Explain what is measured by the sample standardsample mean and explain what is measured by the