1. (4 points) For each of the following paris of variables, is there likely to b

Question

1. (4 points) For each of the following paris of variables, is there likely to be a positive association, a negative association, or no association? Briefly explain your reasoning. (a) Miles of running per week and time for a 5-kilometer run. (b) Speed of a car (mph) and average stopping distance (feet) after the brakes are applied. 2. (4 points) The figure for this exercise is a scatterplot of y-head circumference (cm) versus height (inches) for the 30 females in the physical dataset on the companion website. (a) Does the plot show a positive association, a negative association, or no association between the two variables? Explain. c0 59 58 57 56 (b) One data point appears to be an outlier. What are the approximate values of height and head circumference for that point? 54 53 60 62 4 59 Height lin

Explanation / Answer

1(a) no association ,

1(b)negative association

2(a) no association, the points are scattered and not showing any trend

2(b)x=62 and y=61, upper-left point

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