Chapter 12, Problem 14PT4

To determine

To find: an approach to decide whether hummingbirds a preference for store-bought food on the basis of their quantity.

Answer to Problem 14PT4

A two-sample T test

Explanation of Solution

Check to see how the knowledge feels. 10 feeders are available: 5 with water / sugar and five food obtained from the store. All are random to avoid bias. The data appears as follows:

Feeder 1: Sugar/Water - # for consumed quantity

Feeder 2: Store bought - # for consumed quantity

Two populations certainly exist. You won't use the Z proportion test because it requires a major sample size (that is not 10 feeders).

The freedom Chi square test will not be useful when we have just 1 element (sugar or store purchased).

A paired T test is pointless because there is no pairing of tests.

The optimal solution is a two-sample t test, but as this is a small sample, the distribution of population is of crucial significance and is probable or not.

Hence, the correct option is (d)