Chapter 5, Problem 74E

a.

To determine

Draw the scatterplot of the proportion of failing versus the load on the fabric.

b.

To determine

Find the value of $y^{\prime }=\ln \left(\frac{p}{1-p}\right)$ for each load.

Fit a regression line of the form $y^{\prime }=a+b\left(\text{Load}\right)$.

Describe the significance of the positive slope.

c.

To determine

Predict the proportion of failure of a fabric, for a load of 60 lb/sq in.

d.

To determine

Estimate the maximum safe load to have a less than 5% chance of failing or wardrobe malfunction.