This exercise requires use of a computer package. The accompanying n = 25 observations o...

This exercise requires use of a computer package. The accompanying n = 25 observations on y catch at intake (number of fish), x₁ = water temperature (°C), x₂ = minimum tide height (m), x₃ =number of pumps running, x₄ = speed (knots), and x₅ = wind-range of direction (degrees) constitute a subset of the data that appeared in the article “Multiple Regression Analysis for Forecasting Critical Fish Influxes at Power Station Intakes” (Journal of Applied Ecology [1983]: 33– 42). Use the variable selection procedures discussed in this section to formulate a model.