[{"data":1,"prerenderedAt":48},["ShallowReactive",2],{"q-sw-115-1-research-methods-033":3},{"subject":4,"subjectSlug":5,"subjectFullName":4,"question":6,"related":23},"社會工作研究方法","research-methods",{"id":7,"webId":8,"year":9,"session":10,"subject":4,"legacy":11,"number":12,"stem":13,"options":14,"answer":19,"answerNote":20,"images":21,"lawTimestamp":9,"explanation":22,"freq":10},"sw-115-1-社會工作研究方法-033","sw-115-1-research-methods-033",115,1,false,33,"若社會工作研究方法期中考分數全班平均數為 58 分，標準差為 12 分，於是老師幫每位同學加 2 分，則加分後的標準差是多少？",{"A":15,"B":16,"C":17,"D":18},"10 分","12 分","14 分","因為不知道全班人數而無法判斷","B",null,[],"本題考點為「線性變換中加常數對標準差的影響」。依變異數與標準差的運算性質，對每一筆分數同加一個常數（此題每人加 2 分），會使平均數同步加 2，但每筆分數與平均數的離差（Xi − X̄）完全不變，因此變異數不變、標準差也不變。原標準差為 12 分，加分後仍為 12 分，故選 B。A（10 分）、C（14 分）誤以為加分會縮小或放大離散程度，違反離差不變原理；D 屬混淆，標準差是否改變與人數多寡無關，此性質對任意人數皆成立。",[24,28,32,36,40,44],{"webId":25,"stem":26,"number":10,"year":27,"session":10},"sw-106-1-research-methods-001","什麼是社會工作研究的第一步？",106,{"webId":29,"stem":30,"number":31,"year":27,"session":10},"sw-106-1-research-methods-002","執行研究是為了解概念，但我們仍得在研究前，針對概念給予基本描述與簡要定義。請問這個步驟是：",2,{"webId":33,"stem":34,"number":35,"year":27,"session":10},"sw-106-1-research-methods-003","皮爾森相關係數（r）有幾個特色，下列敘述何者錯誤？",3,{"webId":37,"stem":38,"number":39,"year":27,"session":10},"sw-106-1-research-methods-004","關於信效度的說明，下列何者正確？",4,{"webId":41,"stem":42,"number":43,"year":27,"session":10},"sw-106-1-research-methods-005","當我們要判斷兩個變項間是否有因果關係時，下列那種判斷標準不合適？",5,{"webId":45,"stem":46,"number":47,"year":27,"session":10},"sw-106-1-research-methods-006","關於演繹法的說明，何者有誤？",6,1784109499945]