Consider an Urban Ecologist Who Is Interested in Whether the Presence

question 2

Multiple Choice

Consider an urban ecologist who is interested in whether the presence of high-voltage power lines influences the number of eggs laid by birds nearby. She plans to conduct a two-sample t-test and will assume that the population variances are equal. Her data are as follows:
Near (group 1) : mean = 6.1, SD = 0.35, n = 12
Far (group 2) : mean = 5.8, SD = 0.30, n = 9
What is the t-statistic for the t-test?

• A) 1.96
• B) 2.06
• C) 2.16
• D) 2.26

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Definitions:

February

The second month of the year in the Gregorian calendar, commonly associated with the shortest month of 28 days, except in a leap year when it has 29 days.

Cash Collections

The process or total amount of money received by a company from its customers for goods or services offered.

Accounts Receivable

Money owed to a business by its customers for goods or services delivered but not yet paid for.

May

The fifth month of the Julian and Gregorian calendars, often used in financial and operational planning calendars.