1. In simple linear correlation analysis . A. there is only one variable in the
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1. In simple linear correlation analysis . A. there is only one variable in the model. . B. could be several linear independent variables in the model. . C. there is only one nonlinear term in the model. . D. dependent and independent variables are quantitative. . E. None of the above 2. In simple linear association model, if there is a very strong correlation between the independent and dependent variables, then the correlation coefficient should be o A. close to-1 o B. close to+1 o C. close to either-1 or o D. close to zero. 3. In simple linear correlation, if unit of dependent variable is square feet, then unit of the independent variable . A. must be square feet. . B. can be some unit of square measurement. - C. can be any unit. . D. cannot be a unit of square measurement. 4. The correlation coefficient r was computed to be -0.60. This indicates that: . A. there is almost no relationship between the two variables B. 60 percent of the variation in the independent variable is accounted for by the variation in the dependent variable C. the coefficient of determination is 40% . D. Slope of the linear association is negative. E. none of the above 5. A researcher claims that the yield in bushes per acre is related to the average temperature. Interpret the outcome if he collects data on 6 different regions and computed value of the correlation coefficient is 0.98. - A. There is a moderate correlation between temperature and yield B. There is a perfect correlation between temperature and yield. . C. 2% of changes of temperature is associated with yield. . D. 98% of changes of yield is associated with temperature E. There is a strong positive association between temperature and yield.Explanation / Answer
Q1) Option A is Correct. Only one independent variable
Q2) Option C is Correct. Should be close to -1 or 1
Q3) Option A is Correct. Must have same unit
Q4) Option D is Correct. Since r is negative, slope should be negative as well.
Q5) Option E is Correct
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