Acolonyoflabmiceconsistedofseveralhundredanimals.Theiraverageweight wasabout30grams,andtheSDwasabout5grams.Aspartofanexperiment,grad studentswereinstructedtochoose9animalshaphazardly,withoutanysignificant method.Theaverageweightoftheseanimalsturnedouttobe33gramsandtheSD wasabout7grams.Ischoosinganimalshaphazardlythesameasdrawingthemat random?Oris33gramstoofaraboveaverageforthat?
Once i find the z value how do i know whether to reject or accept the null/
