2. Suppose you had data consisting of the age of subjects (in years) and their r

Question

2. Suppose you had data consisting of the age of subjects (in years) and their reaction time (in seconds). In what units are the following descriptive statistics measured? (a) The mean age of the subject (b) The variance of reaction time (c) The standard deviation of reaction time (d) The median age of the subjects (e) The correlation coefficient between age and reaction time 3. Retrieve the calories/time data from Question 2 that you saved in the last assignment. Obtain the value for r. (a) Is this value consistent with your description of the plot that you provided in Question 2 in the last assignment? Explain. (b) One analyst concluded, "It is clear from this correlation that toddlers who spend more time at the table eat less. Evidently, something about being at the table causes them to lose their appetites." Comment on this explanation. 4, p.173, #31 5, p. 173, #32 6 p.173, #33 7, p. 174, #42 (Use Minitab) 8, p. 175, #46

Explanation / Answer

2.

Given:

age - years

reaction time - seconds

(a) mean age of the subject - years

(b) The variance of reaction time - seconds2

(c) The standard deviation of reaction time - seconds

(d) The correlation coefficient between age and reaction time - Dimensionless - pure number

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