t-Test. Papers Introduction to the t-Test (University of Leicester) Describes the conditions that must be met in order to use of the test.Z-test and t-test are basically the same, they compare between two means to suggest whether both samples come from the same population.
Anchorage gets 22 hours of daylight on the longest day of summer. On the shortest day of winter, there are still seven and a half hours of daylight.
In the far north the sun does actually set in the winter and not come up for about three months. And in the summer, it comes up and doesnât set for about three months. In the south-central part of the state, around Anchorage where most of the population is, we have about 5 hours of daylight in the darkest months. In the summer we have about 5 hours of twilight â it never really gets dark.