MCQ 11 MarkFor which value of the correlation coefficient $(r),$ the regression coefficient becomes zero $?$A$1$B$-1$C$ 11$✓$0$AnswerCorrect option: D. $0$View full question & answer→
MCQ 21 MarkWhich of the following is a regression line of $Y$ on $X$ ?A$\hat{y}=a+b x+c x^2$B$\hat{x}=c+b y$✓$\hat{y}=a+b x$D$\hat{y}=a+b x^2$AnswerCorrect option: C. $\hat{y}=a+b x$View full question & answer→
MCQ 31 MarkWhich regression line is used if the sale of a commodity depends on its advertisement cost ?ARegression line of advertisement cost on saleBRegression line of advertisement cost on advertisement cost✓Regression line of sales on advertisement costDRegression line of sales on salesAnswerCorrect option: C. Regression line of sales on advertisement costView full question & answer→
MCQ 41 MarkWhat is error e in estimation in case of line of regression of $Y$ on $X ?$✓$y – ŷ$B$x̂ – ŷ$C$x – x̂$D$ŷ – x̂$AnswerCorrect option: A. $y – ŷ$View full question & answer→
MCQ 51 MarkThe regression line always passes which point ?✓$(x̄, ȳ)$B$(0, ȳ)$C$(x̄, 0)$D$(0, 0)$AnswerCorrect option: A. $(x̄, ȳ)$View full question & answer→
MCQ 61 MarkWhich of the following is correct ?A$b_{y x}=r \cdot \frac{s_x}{s_y}$B$b_{y x}=r \cdot \frac{S_y{ }^2}{S_x{ }^2}$C$b _{ yx }=\frac{\operatorname{Cov}(x, y)}{S_y^2}$✓$b _{ yx }= r \cdot \frac{s_y}{s_x}$AnswerCorrect option: D. $b _{ yx }= r \cdot \frac{s_y}{s_x}$View full question & answer→
MCQ 71 MarkIn usual notation, what is $b_{y x} ?$AInterceptBDependent Variable✓The approximate change in the value of $Y$ for a unit change in the value of $X.$DThe approximate change in the value of $X$ for a unit change in the value of $Y.$AnswerCorrect option: C. The approximate change in the value of $Y$ for a unit change in the value of $X.$View full question & answer→
MCQ 81 MarkThe best fitted line of regression can be obtained by which method ?✓Least Square Method BKarl Pearson’s MethodCMaximum Square MethodDBowley’s MethodAnswerCorrect option: A. Least Square Method View full question & answer→
MCQ 91 MarkIf $r = 0.8,$ how much part of the total variation in the dependent variable can be explained by the regression model $?$A$80\%$✓$64\%$C$36\%$D$20\%$AnswerCorrect option: B. $64\%$View full question & answer→
MCQ 101 MarkIf $u =\frac{x-15}{10}$ and $v =\frac{y-50}{2}$ and $b _{ yx }=7.5$, what is the value of $b _{ vu }$ ?A$7.5$B$1.5$✓$37.5$D$150$AnswerCorrect option: C. $37.5$View full question & answer→
MCQ 111 MarkThe regression line of $Y$ on $X$ is $ŷ = 30 – 1.5x.$ What is the value of $ȳ$ if $x̄ = 10 ?$A$28.5$B$20$✓$15$D$45$AnswerCorrect option: C. $15$View full question & answer→
MCQ 121 MarkWhat is the value of $b_{y x}$ if the regression line is $2 x+3 y-50=0$ ?A$\frac{3}{2}$B$-\frac{3}{2}$✓$-\frac{2}{3}$D$2$AnswerCorrect option: C. $-\frac{2}{3}$View full question & answer→
MCQ 131 MarkIf the regression line is $=10 + 3x,$ what is the estimate of $Y$ for $X = 20 ?$A$13$B$60$✓$70$D$203$AnswerCorrect option: C. $70$View full question & answer→
MCQ 141 MarkWhat is coefficient of determination in the study of regression for two variables ?AProduct of two standard deviations✓Square of correlation coefficientCSquare of covarianceDProduct of two variancesAnswerCorrect option: B. Square of correlation coefficientView full question & answer→
MCQ 151 MarkWhich of the following indicates the functional relation between the two variables ?ACorrelation✓RegressionCMeanDVarianceAnswerCorrect option: B. RegressionView full question & answer→
MCQ 161 MarkRegression co-efficient is $........$ measure.✓AbsoluteBRelativeCAverageDGeometricAnswerCorrect option: A. AbsoluteView full question & answer→
MCQ 171 MarkWhich type of mean of regression co-efficient is $........$ measure.AArithmetic BWeighted Average✓GeometricDHarmonicAnswerCorrect option: C. GeometricView full question & answer→
MCQ 181 MarkHow can we obtain the line of the best fit ?ABy product moment method✓By least square methodCBy scatter diagram methodDBy noneAnswerCorrect option: B. By least square methodView full question & answer→
MCQ 191 MarkWhich statistician gave the concept of regression ?✓Sir Francis GaltonBC.F. GaussCSpearmanDJames BernauliAnswerCorrect option: A. Sir Francis GaltonView full question & answer→
MCQ 201 MarkThe regression line always passes through which point ?✓$(\bar{x}, \bar{y})$B$(0, \bar{y})$C$(\bar{x}, 0)$D(0, 0)AnswerCorrect option: A. $(\bar{x}, \bar{y})$AView full question & answer→
MCQ 211 MarkIf $r=0.8$, how much part of the total variation in the dependent variable can be explained by the regression model ?A$80 \%$✓$64 \%$C$36 \%$D$20 \%$AnswerCorrect option: B. $64 \%$BView full question & answer→
MCQ 221 MarkWhat is the value of $b_{yx}$ if the regression line of Y on X is $2x+3y-50=0$?A$\frac{3}{2}$B$-\frac{3}{2}$✓$-\frac{2}{3}$D2AnswerCorrect option: C. $-\frac{2}{3}$CView full question & answer→
MCQ 231 MarkWhich statistician was the first to use the term regression ?AKarl Pearson✓Sir Francis GaltonCSpearmanDC.F. GaussAnswerCorrect option: B. Sir Francis GaltonBView full question & answer→