I need help with (a) and (c), cannot find the answers anywhere. (a) When determi

Question

I need help with (a) and (c), cannot find the answers anywhere.

(a) When determining if two paired quantitative variables are associated, what type of graph would be most useful? A. box plot. B. histogram OC. bar chart. D. scatter plot. E. dot plot. (b) Which of the following is not a possible value for a correlation coefficient? OA. 1.22 C. 0.959 D.-0.555 E. None of the above. (c) Which of the following variables is most likely to have a negative association? OA. children's heights and weights. B. sales of hot chocolate and outside temperature. C. number of hours students spend studying and their GPAs. D. monthly household income and monthly household expenses. E. None of the above.

Explanation / Answer

a) For checking association between two paired quantitative variable, we always use scatterplot.

Hence,

Option D is correct.

b) Correlation coefficient can't be greater than 1. Hence,

Option A is correct.

c) The negative association should be betwen sales of hot chocolate and outside temperature because as the temperature goes down, sales of hot chocolate increases.

Hence,

Option B is correct.

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