e progresul comportamentului diferitelor categorii de cheltuieli ...
e progresul comportamentului diferitelor categorii de cheltuieli ...
e progresul comportamentului diferitelor categorii de cheltuieli ...
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Pentru exemplificare se folosesc datele din WDEHOXO XUP WRU<br />
(tabelul 3.13):<br />
Perioada<br />
y<br />
lei<br />
cifra <strong>de</strong><br />
afaceri<br />
miliar<strong>de</strong><br />
lei<br />
x 2<br />
1<br />
x<br />
1<br />
2<br />
x<br />
y<br />
x<br />
Tabelul 3.13<br />
y = a +<br />
1 379,89 1,6 2,56 0,625 0,391 237,43 407,74<br />
2 382,11 2,0 4,00 0,500 0,250 191,06 364,77<br />
3 380,57 2,6 6,76 0,385 0,148 146,37 286,63<br />
4 259,27 3,4 11,56 0,294 0,086 76,26 293,98<br />
5 260,59 4,4 19,36 0,227 0,052 59,23 270,99<br />
n 1662,43 14,0 44,24 2,031 0,927 710,35 x<br />
(FXD LD SUHVXSXQH VLVWHPXO<br />
1<br />
∑ y = na + b∑<br />
x<br />
∑ ∑ ∑ ⎟ y 1 ⎛ 1 ⎞<br />
= a + b ⎜<br />
x x 2<br />
⎝ x ⎠<br />
<strong>de</strong> un<strong>de</strong>:<br />
1 1 y<br />
∑ y × ∑ − ∑ × ∑<br />
2<br />
x x x 1662,<br />
43×<br />
0,<br />
927 − 2,<br />
031×<br />
710,<br />
35<br />
a =<br />
=<br />
=<br />
2<br />
2<br />
1 ⎛ 1 ⎞<br />
5 × 0,<br />
927 − 2,<br />
032<br />
n∑<br />
− ⎜∑<br />
⎟<br />
2<br />
x ⎝ x ⎠<br />
1541,<br />
073 −1442,<br />
721 98,<br />
352<br />
=<br />
= = 192,<br />
85<br />
4,<br />
635 − 4,<br />
125 0,<br />
51<br />
y 1<br />
n∑<br />
− ∑ y × ∑<br />
x x 5 × 710,<br />
35 −1662,<br />
43 × 2,<br />
031<br />
b =<br />
=<br />
=<br />
2<br />
1 ⎛ 1 ⎞<br />
0,<br />
51<br />
n∑<br />
− ⎜∑<br />
⎟<br />
2<br />
x ⎝ x ⎠<br />
3551,<br />
75 − 3376,<br />
395<br />
=<br />
= 343,<br />
83<br />
0,<br />
51<br />
343,<br />
83<br />
'DF [ PLO OHL y =<br />
192,<br />
85 + = 261,<br />
62 lei<br />
5<br />
b<br />
x