Zadanie 1. |
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Dekompozycja szeregów czasowych |
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A) |
Gospodarstwa domowe wyposażone w komputery jako % ogółu przedsiębiorstw |
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Lata |
2003 |
2004 |
2005 |
2006 |
2007 |
2008 |
2009 |
2010 |
2011 |
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Yt |
36.3 |
40.1 |
45.4 |
53.7 |
58.9 |
66.1 |
69 |
71.3 |
73.4 |
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B) |
Migracje zagraniczne na pobyt stały (imigracja, w tys. osób) |
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Lata |
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2011 |
2012 |
Yt |
6.6 |
6.6 |
7 |
9.5 |
9.3 |
10.8 |
15 |
15.3 |
17.4 |
15.2 |
15.5 |
14.6 |
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C) |
Oferty pracy (ogółem, w tys., stan na koniec okresu) |
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trend rosnący, zbliżony do liniowego(tendencja rozwojowa) |
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trend rosnący z wahaniami przypadkowymi |
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Rok |
2005 |
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2007 |
2008 |
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Kwartał |
I kw. |
II kw. |
III kw. |
IV kw. |
I kw. |
II kw. |
III kw. |
IV kw. |
I kw. |
II kw. |
III kw. |
IV kw. |
I kw. |
II kw. |
III kw. |
IV kw. |
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tręd rosnący +wahania sezonowe+wwahania przypadkowe |
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Yt |
26.8 |
35.1 |
39.8 |
17.5 |
39.4 |
57.1 |
61.7 |
30.7 |
64.5 |
77.2 |
70.2 |
44.5 |
71.3 |
80.7 |
73.8 |
30 |
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Zadanie 2 |
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Relacja liczby uczniów do liczby nauczycieli w województwie podkarpacjkim (dane umowne |
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?????????????????????? |
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Lata |
Yt |
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2005 |
52.3 |
1 |
52.3 |
105.4 |
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2006 |
53.1 |
2 |
53.1 |
158.5 |
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2007 |
53.6 |
3 |
53.6 |
211.6 |
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2008 |
53.9 |
4 |
53.9 |
264.7 |
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2009 |
54.1 |
5 |
54.1 |
317.8 |
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2010 |
54.8 |
6 |
54.8 |
370.9 |
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2011 |
55.6 |
7 |
55.6 |
424 |
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2012 |
56.1 |
8 |
56.1 |
477.1 |
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2013 |
57.2 |
9 |
57.2 |
530.2 |
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2014 |
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10 |
52.3 |
583.3 |
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2015 |
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11 |
53.1 |
636.4 |
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Zadanie 4. |
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W oparciu o dane z zadania 1A (patrz wyżej oszacowano parametry liniowej funkcji trendu |
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Lata |
yt |
t |
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2003 |
36.3 |
1 |
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PODSUMOWANIE - WYJŚCIE |
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2004 |
40.1 |
2 |
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2005 |
45.4 |
3 |
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Statystyki regresji |
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2006 |
53.7 |
4 |
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Wielokrotność R |
0.985 |
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2007 |
58.9 |
5 |
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R kwadrat |
0.970 |
model w 97% opisuje zmiennosc liczby gospodarstw domowych wyposazonych w komputery jako procent ogółu przeds |
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2008 |
66.1 |
6 |
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Dopasowany R kwadrat |
0.965 |
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2009 |
69 |
7 |
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Błąd standardowy |
2.597 |
szacując liczbę gospodarstw domowych wyposażonych w komputery jako % ogółu przedsiębiorstw w badanym okresie mylimy się średnio o 2,6 % |
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2010 |
71.3 |
8 |
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Obserwacje |
9 |
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2011 |
73.4 |
9 |
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Współczynniki |
Błąd standardowy |
t Stat |
Wartość-p |
Dolne 95% |
Górne 95% |
Dolne 95,0% |
Górne 95,0% |
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średni y |
57.13 |
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Przecięcie |
32 |
1.887 |
16.960 |
0.000 |
27.538 |
36.462 |
27.538 |
36.462 |
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sredni błąd modelu |
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Kowalski Ryszard:
sredni blad modelu wynosi około 5% sredniej wartosci zmiennej objasnianej co swiadczy o dobrym dopasowaniu modelu do danych empirycznych
5% |
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t |
5.027 |
0.335 |
14.992 |
0.000 |
4.234 |
5.820 |
4.234 |
5.820 |
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w badanych latach teoretyczna liczba gosp domowych wyposażonych w komputery wynosiła 32 % |
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t=w badanym okresie liczba gosp domowych wyposazonych w komputery rosła z roku na rok średnio rosła o 5,03 % |
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równanie |
y=32+2,03t |
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Zadanie 3 |
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okres |
wartość zmiennej yt |
prognoza zmiennej yt* |
yt-yt* |
lyt-yt*I |
(Iyt-yt*I/ yt)*100 |
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1 |
7 |
6 |
1 |
1 |
14.29 |
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2 |
10 |
11 |
-1 |
1 |
10 |
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3 |
12 |
13 |
-1 |
1 |
8.33 |
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4 |
16 |
15 |
1 |
1 |
6.25 |
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5 |
14 |
13 |
1 |
1 |
7.14 |
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0.2 |
1 |
9.20 |
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ME |
MAE |
MAPE |
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ME |
odchylenie prognozy wynosiło 0,2 |
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MAE |
wartość rzeczywistych badanych zjawisk różnią się od prognoz średnio o 1 |
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MAPE |
wartść rzeczywista różni się od prognoz w badanym okresie o 9,20% |
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Zadanie 1. |
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Dekompozycja szeregów czasowych |
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A) |
Odsetek kobiet z wykształceniem co najmniej zawodowym w populacji kobier w wieku 20-24 lata |
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Lata |
2000 |
2001 |
2002 |
2003 |
2004 |
2005 |
2006 |
2007 |
2008 |
2009 |
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yt |
91.2 |
90.2 |
90.5 |
92.8 |
93 |
93.3 |
93.8 |
93.4 |
93.3 |
93.2 |
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B) |
Przewozy pasażerów ogółem (w tys. osób) |
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Lata |
2000 |
2001 |
2002 |
2003 |
2004 |
2005 |
2006 |
2007 |
2008 |
2009 |
2010 |
2011 |
2012 |
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yt |
1,319,972 |
1,236,583 |
1,124,940 |
1,112,533 |
1,085,509 |
1,046,930 |
1,024,413 |
1,006,369 |
966,001 |
902,176 |
838,024 |
807,141 |
779,797 |
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C) |
Przeciętne miesięczne wynagrodzenie nominalne brutto w sferze budżetowej (w zł), |
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trend rosnący + wahania przypadkowe |
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tręd malejący +wahania przypadkowe |
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trend rosnący + wahania przypadkowe+wahania sezonowe |
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Rok |
2005 |
2006 |
2007 |
2008 |
2009 |
2010 |
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Kwartał |
I kw. |
II kw. |
III kw. |
IV kw. |
I kw. |
II kw. |
III kw. |
IV kw. |
I kw. |
II kw. |
III kw. |
IV kw. |
I kw. |
II kw. |
III kw. |
IV kw. |
I kw. |
II kw. |
III kw. |
IV kw. |
I kw. |
II kw. |
III kw. |
IV kw. |
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Yt |
2876.89 |
2304.04 |
2327.4 |
2497.59 |
2986.24 |
2410.73 |
2448.6 |
2640.55 |
3104.5 |
2582.76 |
2582.6 |
2827 |
3334.46 |
2937.79 |
2915.76 |
3219.37 |
3712.9 |
3115.23 |
3110.88 |
3304.14 |
4052 |
3183.02 |
3218.1 |
3566 |
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Zadanie 2 |
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Relacja liczby uczniów do liczby nauczycieli w województwie łódzkim (dane umowne |
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Lata |
yt |
Yt* |
yt-yt* |
|yt-yt*| |
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2005 |
67.1 |
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ME |
-0.0125 |
Prognozy są obciążone, są nieco zawyżone w stosunku do wartości rzeczywistej |
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2006 |
67.4 |
67.1 |
0.30 |
0.3 |
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MAE |
0.49 |
Prognozowana Średnia liczba uczniów przypadających na jednego nauczyciela różni się od wartości rzeczywistej średnio o 0,49 ucznia. |
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2007 |
66.9 |
67.4 |
-0.50 |
0.5 |
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MAPE |
6% |
Prognozowana Średnia liczba uczniów przypadających na jednego nauczyciela różni się od wartości rzeczywistej średnio o 6% |
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2008 |
66.5 |
66.9 |
-0.40 |
0.4 |
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2009 |
66.8 |
66.5 |
0.30 |
0.3 |
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2010 |
67.5 |
66.8 |
0.70 |
0.7 |
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2011 |
66.9 |
67.5 |
-0.60 |
0.6 |
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2012 |
66.4 |
66.9 |
-0.50 |
0.5 |
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2013 |
67.0 |
66.4 |
0.60 |
0.6 |
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67 |
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67 |
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0.49 |
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Zadanie 4. |
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W oparciu o dane z zadania 1A (patrz wyżej oszacowano parametry liniowej funkcji trendu |
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Lata |
yt |
t |
yt* |
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2000 |
91.2 |
1 |
90.9018181818182 |
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2001 |
90.2 |
2 |
91.250303030303 |
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PODSUMOWANIE - WYJŚCIE |
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2002 |
90.5 |
3 |
91.5987878787879 |
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2003 |
92.8 |
4 |
91.9472727272727 |
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Statystyki regresji |
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2004 |
93 |
5 |
92.2957575757576 |
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Wielokrotność R |
0.802 |
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2005 |
93.3 |
6 |
92.6442424242424 |
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R kwadrat |
0.643 |
model w 64% opisuje zmienność liczby kobiet z wykształceniem co najmniej zawodowym w populacji kobiet w wieku 20-24 lata |
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określa jaka część zmiennej objaśnianej została wyjaśniona przez model |
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2006 |
93.8 |
7 |
92.9927272727273 |
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Dopasowany R kwadrat |
0.598 |
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2007 |
93.4 |
8 |
93.3412121212121 |
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Błąd standardowy |
0.834 |
szacując liczbę kobiet z wykształceniem co najmniej zawodowym w populacji kobiet w wieku 20-24 lata mylimy się średnio o ,83 % |
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w badanym okresie wartości rzeczywiste zmiennej objaśnianej różnią się od wartości teoretycznych wyznaczonych na podstawie funkcji trendu średnio o 0,834 |
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2008 |
93.3 |
9 |
93.689696969697 |
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Obserwacje |
10 |
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2009 |
93.2 |
10 |
94.0381818181818 |
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11 |
94.3866666666667 |
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12 |
94.7351515151515 |
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średni y |
92.47 |
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Współczynniki |
Błąd standardowy |
t Stat |
Wartość-p |
Dolne 95% |
Górne 95% |
Dolne 95,0% |
Górne 95,0% |
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średni błąd modelu |
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Kowalski Ryszard:
sredni blad modelu wynosi około 1% sredniej wartosci zmiennej objasnianej co swiadczy o dobrym dopasowaniu modelu do danych empirycznych
1% |
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Przecięcie |
90.55 |
0.57 |
158.97 |
0.00 |
89.24 |
91.87 |
89.24 |
91.87 |
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t |
0.35 |
0.09 |
3.80 |
0.01 |
0.14 |
0.56 |
0.14 |
0.56 |
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w badanych latach teoretyczna odsetek liczby kobiet z wykształceniem co najmniej zawodowym w populacji kobiet w wieku 20-24 lata wynosił 90 |
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w badanym okresie odsetek liczby kobiet z wykształceniem co najmniej zawodoym w populacji kobiet w wieku 20-24 lata rósł średnio o 0,35% |
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równanie |
y=90,55+0,35t |
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błąd, który popełniono przy szaczowaniu przy szacowaniu poszczególnych parametrów funkcji trendu |
przedział ufności dla paramtrów modelu, które z 95% prawdopodobieństwem określają granice przedziału do którego należy dany parametr modelu |
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