[{"question":"Ozna\u010d vz\u0165ah pre \u0161tatistick\u00fa kovarianciu: (X,Y - priemer): k(x,y) =","answers":["(1\/(n-1))SUM(xi - X)(yi - Y)","1\/(n+1)SUM(xi - X)(yi - Y)","SUM(xi + X)(yi - Y)","SUM(xi + X)(yi +Y)"],"correct":"(1\/(n-1))SUM(xi - X)(yi - Y)","order":"1"},{"question":"Smerodajn\u00fa odch\u00fdlku vyjadr\u00edme vz\u0165ahom:","answers":["?((1\/(n-1))SUM(xi +X))2","?((1\/(n-1))SUM(xi -X))2","?((1\/(n+1))SUM(xi -X))2","(1\/(n-1))SUM(xi -X))2"],"correct":"?((1\/(n-1))SUM(xi -X))2","order":"2"},{"question":"Korela\u010dn\u00fd koeficient m\u00f4\u017eeme definova\u0165 vz\u0165ahom:","answers":["k(x,y) \/sx2sy","sxsy\/k(x,y)","k(x,y)\/sxsy","sx2sy2\/k(x,y)"],"correct":"k(x,y)\/sxsy","order":"3"},{"question":"Pre v\u00fdpo\u010det kovariancie v programe Excel pou\u017e\u00edvame funkciu","answers":["AVERAGE","COVAR","CORREL","COUNT"],"correct":"COVAR","order":"4"},{"question":"Pre v\u00fdpo\u010det korela\u010dn\u00e9ho koeficienta v programe Excel pou\u017e\u00edvame funkciu","answers":["AVERAGE","COVAR","CORREL","COUNT"],"correct":"CORREL","order":"5"},{"question":"(SUM(xi - X)(yi - Y))\/?(SUM(xi - X)2SUM(yi-Y)2) je vz\u0165ah pre","answers":["kovarianciu","smerodajn\u00fa odch\u00fdlku","rozptyl","korela\u010dn\u00fd koeficient"],"correct":"korela\u010dn\u00fd koeficient","order":"6"},{"question":"Pre 5 dvoj\u00edc hodn\u00f4t znakov x a y (xi\/yi) vypo\u010d\u00edtaj kovarianciu (3\/5, 2\/6, 4\/7, 8\/11, 6\/9):","answers":["5,55","3,81","5,32","4,44"],"correct":"4,44","order":"7"},{"question":"Pre 5 dvoj\u00edc hodn\u00f4t znakov x a y (xi\/yi) vypo\u010d\u00edtaj korela\u010dn\u00fd koeficient (3\/5, 2\/6, 4\/7, 8\/11, 6\/9):","answers":["0,957","0,597","0,795","0,579"],"correct":"0,957","order":"8"},{"question":"Korela\u010dn\u00fd koeficient 0,97 n\u00e1m hovor\u00ed, \u017ee ide o mieru line\u00e1rnej z\u00e1vislosti:","answers":["mal\u00fa","miernu","siln\u00fa","takmer nulov\u00fa"],"correct":"siln\u00fa","order":"9"},{"question":"Ak je korela\u010dn\u00fd koeficient medzi 2 znakmi 0,8 hovor\u00edme, \u017ee ide o mieru line\u00e1rnej z\u00e1vislosti","answers":["mal\u00fa","miernu","siln\u00fa","takmer nulov\u00fa"],"correct":"miernu","order":"10"}]