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Statistics 1 Marks Each

PART 1 : LINEAR CORRELATION · Gujarat Board (GSEB) STD 12 Commerce (GSEB - English Medium). 23 questions.

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23 questions · timed · auto-graded

Question 11 Mark
If correlation coefficient between two variables $X$ and $Y$ is $0.64$, what is the correlation coefficient for $\left(2 X, \frac{Y}{3}\right)$ ? Why ?
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Question 21 Mark
If correlation coefficient between two variables $X$ and $Y$ is $0.8$ then what is the correlation coefficient between $(50-X)$ and $Y$ ?
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Question 31 Mark
What will be the effect of change of origin and scale on the value of correlation coefficient ?
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Question 51 Mark
What will be the sign of correlation coefficient if the value of covariance is positive ?
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Question 71 Mark
What is the value of $r$, if $R_x=R_y$ for each pair of observations for two variables $X$ and $Y$ ?
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Question 81 Mark
In which situation, the values of correlation coefficient obtained by Karl Pearson's and Spearman's method are equal ?
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Question 141 Mark
When can we say that there is a partial positive correlation between two correlated variables ?
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Question 221 Mark
Which direction would the two variables change if there is a negative correlation between two variables ?
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Question 231 Mark
Which type of correlation exists between two variables, if the values of two variables change in the same direction?
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