1. a random sample of the population that has come from the normal distribution. 2 the variance of each study population data. Measurement of level 3 to level antonphak variables (Interval scale) or more.
1 random sample comes from a normal population variance of two populations of the same three variables as a measure of the interval (Interval scale) or above.
1 samples randomly selected from the population with normal distribution.2 variance of each population are equivalent.3 level of measurement level interval (Interval scale) or above.