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(Solved by Expert Tutors) -1. Correlation is a measure that -Determines the


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1. Correlation is a measure that
-Determines the

strength of a general relationship between variables
-Helps the researcher find quadratic relationships between variables
-Will determine if there is a causal relationship between variables
-None of the above
-A?correlation?of?0.62?would?indicate?a?(n)
-?????????????
-strong?positive?relationship??????????????
-weak?negative?linear?relationships??????????????
-strong?positive?linear?association?
-?????????????
-None?of?the?above?Suppose?we?have?firm?size?data?(number?of?employees)?stored?in?a?variable?f_size,?in?R?as?a?vector,?and?we?have?revenue?data?stored?in?variable?revenue,?in?R?as?a?vector.?Use?this?to?answer?the?following?questions:
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-Which command would plot the scatter plot where the revenue is on the vertical axis and the firm size is on the horizontal axis?
-scatplot(f_size,revenue)
-plot(revenue,f_size)
-plot(f_size,revenue)
-None?of?the?above
-Which command will find the correlation between firm size and revenue?
-correlation(f_size,revenue)
-cor(f_size,revenue)
-c(f_size,revenue)
-None?of?the?above
-6 Which of the following is true of correlation:
-If there is a correlation between two variables, then there must be a causation between them.
-If there is a causation between two variables, then there must be a correlation between them.
-Both (1) and (2) are true
-Neither (1) nor (2) are true

 


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