Everywhere North of the Arctic Circle

question 8

Multiple Choice

Everywhere north of the Arctic Circle

• A) there is no land.
• B) there is ice but no liquid water.
• C) there is no sunlight all winter.
• D) there is no sunlight only at the winter solstice, which is usually December 22^nd.

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Definitions:

Sample Proportions

The fraction or percentage of observations in a sample that fall into one particular category or class.

Standard Error

The standard deviation of the sampling distribution of a statistic, commonly the mean, indicating the variation of a sample statistic from the population parameter.

Lower Tailed Test

A statistical hypothesis test where the critical area of a distribution is in its lower tail, used to determine if a sample mean is significantly lower than a known or assumed population mean.

Test Statistic

A statistic calculated from sample data, used to determine whether to reject the null hypothesis in a hypothesis test.