Chapter 7, Problem 10SE

a.

To determine

Find the least-squares line for predicting the flight period (y) from wingspan (x).

b.

To determine

Find the 95% confidence interval for ${\beta }_0$ and ${\beta }_1$.

c.

To determine

By how much would estimate that flight periods differ when two butterflies differ in wingspan by 2 mm.

d.

To determine

Check whether the data provide sufficient evidence to conclude that species of butterflies with larger wingspans have shorter flight periods on average.

e.

To determine

Check whether the data provide sufficient evidence to conclude that the mean flight period for butterflies with a wingspan of 30mm is less than 28 days.

f.

To determine

Find the 95% prediction interval for flight period when the wingspan is 28.5 mm.