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.
The temperature in Anchorage creeps above 69 degrees Fahrenheit an average of just 12 days a year and normally doesn't get above 80 degrees. Anchorage's spells of 70-degree weather typically occur from May to August. Warm weather during winter is scarce.or most of winter Anchorage's temperature remains below freezing all day long. The thermometer there drops to 0 degrees Fahrenheit or colder an average of 20 days a year. Daytime highs of less than 33 degrees can also occur during October, November, March and April.