Calculate the test StatisticSubj: Statistics and probabilityA forester is studying the number of cavity trees in old growth stands in Arroceros Forest Park in Manila. He wants to know if there is a significant difference between the mean number of cavity trees in Arroceros Forest Park and the old growth stands in La Mesa Ecopark . He collects two independent random samples from each forest.

4. Growth of pine seedlings in two different substrates was measured. We want to know if growth was better in substrate 2. Growth (in cm/yr) was measured and included in the table below. Substrate 1 Substrate 2 3.2 4.5 4.5 6.2 3.8 5.8 4.0 6.0 3.7 7.1 3.2 6.8 4.1 7.2