A RESEARCHER RANDOMLY SELECTS 36 STUDENTS,SHOWS THEM A FILM,QUESTIONNAIRE ABOUT ATTITUDES. MEAN SCORE OF 36 STUDENTS IS 70, SCORE FOR PEOPLE IN GENERAL IS 74,WITH A STANDARD DEVIATION O 12. USING THE 5 STEP OF HYPOTHESIS Z TEST &5% SIGNIFICANCEDOES LEVEL.DOES THE FILM CHANGE THE STUDENTS ATTITUDES?

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