-8.Multiple Choice: each questien wonh 4 points mximum 1) The chi-square test or

Question

-8.Multiple Choice: each questien wonh 4 points mximum 1) The chi-square test or goodness-ot-tit shodte used to decide wheher A two noninal variablesoe facters are independent or dependcet B) a popalaton with nominal anariable nd with an unknown distribution is the sume as a population with a knoan distributian C) two porlos with urkown disibuzices hne the same distribution as each other D) two pepulasion variances fee standd deviies) are the same. 2) The chi-square tes·For independence shouidbe used to decide whether: A) two noninal variables or facters are independent or dependee B) a population with nocinal rand able dh unknown disstibution is the same as a population with a knean distrihutian C) two porwith unkoown disiribuzioes hune the sume distributicn as each other D) two populon vriances or standand deviarioes) are the same. I ted ein pen.oe 6) Delermine the appopriate chi-square hypotbsis test touse for the following scenario: The ownor of a haveball team is interastad in the nelationship between player salaries and sean winning perventnge. He takes a dom sampl of 1I players rom diferent organizations A) s for gooiness-or-t B) tes for homogeneity C) tt for indepodence D) tesz af a single variance The value idestitying the percest ef variuion in the depesdent varbleytht can be explained by variatice in the independent variable x using the regression line is A) cerrelation coefficient B) standard deviation ot, suret' resolull, r C) population comelacion coetficien D) coefficient of determinaic 8) For a given set of related viriables. Ihe ..line e! burst fit" cquaton is--1 14.95 + 37.08x and the correlation ccefficent risdetentined to be r =-021 , which ef the following concerning be gives of relatedariables is most orret? A) The earrelation between vaiables is perfecly egative B) The earrelation betwee iables is egly negae. C1 The earrelation between riables iskly neatie D) r cannot be negative if slope foeicntx) is positive

Explanation / Answer

Question 1 :

Answer (B) a population with nominal random variable and with an unknown distribution is the same as a population with a known distribution.

Question 2 :

Answer (A) Two nominal variables or factors are independent or dependent.

Question 3 :

Answer (B) test of homogeniety

Question 4 :

Answer (A) Goodness of fit

Question 5 :

Answer (c) test of independence.

Question 6 :

Answer (c) test of independence

Question 7 :

Answer (D) coefficient of determination r2

Question 8 :

Answer (D) r cannot be negative if slope (coefficient of X) is positive.

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