*Build Means DATASET ACTIVATE DataSet3. COMPUTE Country_Mean=MEAN(Country_1,Country_2,Country_3,Country_4,Country_5,Country_6,Country_7, Country_8,Country_9,Country_10,Country_11,Country_12). EXECUTE. DATASET ACTIVATE DataSet3. COMPUTE City_Mean=MEAN(City_1,City_2,City_3,City_4,City_5,City_6,City_7, City_8,City_9,City_10,City_11,City_12). EXECUTE. COMPUTE CountryNASA=(Country_Mental+Country_Physical+Country_Time+(20-Country_Performance)+ Country_Fatigue+Country_Frustration)/6. EXECUTE. COMPUTE CityNASA=(City_Mental+City_Physical+City_Time+(20-City_Performance)+ City_Fatigue+City_Frustration)/6. EXECUTE. *Calculate T-Tests T-TEST PAIRS=City_Mean CityNASA WITH Country_Mean CountryNASA (PAIRED) /CRITERIA=CI(.9500) /MISSING=ANALYSIS.