Chapter 4.3, Problem 31AYU

(a)

To determine

To identify: The explanatory variable.

(b)

To determine

To explain: Why the provided data is considered as bivariate quantitative data.

(c)

To determine

To draw: The scatter diagram of the provided data.

To determine

To comment: On association between width and length of data set.

(d)

To determine

To compute: Correlation coefficient of the provided data.

(e)

To determine

Whether the variables share a linear relationship.

(f)

To determine

The regression line.

(g)

To determine

To predict: The length for the width of 500 yards.

(h)

To determine

Whether the tornado with width 180 yards and length 1.9 miles is greater than expected.

(i)

To determine

To interpret: The slope.

(j)

To determine

To explain: Reason that the $y\text{<mo>−</mo>intercept}$ cannot be interpreted.

(k)

To determine

To compute: The proportion of variability of the tornado length explained by its width.

(l)

To determine

To plot: The residual plot.

To determine

To interpret: Whether the residual plot suggests that variables are linearly related.

(m)

To determine

To draw: Boxplots of the residuals.

To determine

Whether there are any outliers.

(n)

To determine

Whether the added observation is influential.