In a study of marital satisfaction, a random sample of 12 couples married for between five and fifteen years was obtained. Each couple was interviewed by the researcher and rated on a Marital Cohesion (MC) scale. MC MC2 14 196 81 7 49 14 196 15 225 13 169 10 100 17 289 11 121 18 324 14 196 14 196 Σ- 156 E(x2) =2142 What is the standard deviation of Scores for hypothesis testing?

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