Just need the answers to these

1. Used to examine if the mean from one sample is statistically different from the known population mean. 2. The statistical test used to test for homogeneity of variance. 3 Can result in uncertainty about group equivalency due to a lack of randomization. 4. Used to compare the means of two samples when the samples are related or when the same measure is made at two points in time for the same sample. 5. The way subjects are selected in one sample has no impact on the way subjects are selected in for the second sample