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QUALITY INDICATORS <strong>2017</strong><br />

Example 1: Let us say that, in a particular survey, monthly indices, month with regard to the average of the<br />

previous year, are such as presented in the table below.<br />

Table 3.9: Example of the calculation of indicator S2 - indices<br />

Jan.<br />

08<br />

Feb.<br />

08<br />

Mar.<br />

08<br />

Apr.<br />

08<br />

May<br />

08<br />

June<br />

08<br />

90.29 94.97 96.997 89.08 103.7 105.4 110.5 101.5 95.5 91.74 97.948 89.66<br />

Let us further assume that the index of the annual growth rate calculated in the referential annual survey<br />

(average of 2008 compared to the average of 2007) I<br />

0<br />

99, 7 . Since this index is equal to the index calculated<br />

as the (arithmetic) mean in the table of given indices, the calculation is as follows:<br />

I<br />

t<br />

<br />

( I<br />

Jan Dec 07<br />

/ 07,...,<br />

I<br />

/<br />

) 97.27<br />

S 2 97.27 99.7 2.43<br />

Example 2: Let us assume that in two comparable quarterly surveys financial aggregates (in EUR) are being<br />

monitored. The table shows results in both the study survey and the referential survey and the relevant value of<br />

indicator S2.<br />

July<br />

08<br />

Table 3.10: Example of the calculation of indicator S2 – sums<br />

Aug.<br />

08<br />

Sep.<br />

08<br />

Oct.<br />

08<br />

Nov.<br />

08<br />

Dec.<br />

08<br />

1 st quarter 09 2 nd quarter 09 3 rd quarter 09 4 th quarter 09 Average value:<br />

X t 95876 96061 96375 95881<br />

X 0 98177 97502 97821 102113<br />

S2 (%) 2.4 1.5 1.5 6.1 2.9<br />

26

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