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.
Peak season is mid-June to mid-August. Before and after, some day tours and hotels offer shoulder season discounts of 10-25%. June 21 is the longest day of the year, with 19 hours of daylight in Anchorage, 22 in Fairbanks, and 18 in Southeast.