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.
January 2018 - Anchorage, Alaska - Sunrise and sunset calendar. Sunrise and sunset times, civil twilight start and end times as well as solar noon, and day length for every day of January in Anchorage, AK. In Anchorage, AK, the first day of January is 5 hours, 42 minutes long. The last day of the month is 7 hours, 48 minutes, so the length of the days gets 2 hours, 5 minutes longer in January 2018.