Feb
27th
Wed
27th
Mean year of opening
* For County, Region and Grand total aggregations, display the mean year out of all the Attractions in said County, Region or Grand total. e.g. For County ‘x’, which has the Attraction 1 (Year 1st opened = 1940), Attraction 2 (year 1st opened = 1993) and Attraction 3 (Year 1st opened = 2000), display ‘Mean year of opening’ as ‘1978’.
* For County, Region and Grand total aggregations, display the mean year out of all the Attractions in said County, Region or Grand total. e.g. For County ‘x’, which has the Attraction 1 (Year 1st opened = 1940), Attraction 2 (year 1st opened = 1993) and Attraction 3 (Year 1st opened = 2000), display ‘Mean year of opening’ as ‘1978’.
— одно из требований к системе. Интересно, кому мог понадобиться средний год открытия музеев/библиотек?
