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.
Hours of daylight range from 14 to 18, with June having the most daylight hours and September having the least. South central Alaska has similar weather, with average temperature highs of 55 degrees Fahrenheit in both May and September; average temperatures range between 62 and 65 degrees F in June, July and August. May, June and July have the most daylight hours (17 to 18), while August averages 16 hours of daylight.