What is the formula for calculating degrees of freedom for a dependent-samples t test?

A) k - 1
B) n - 1
C) n(1)
D) k + 1

Variability between groups is due to which of the following?

A) chance
B) the grouping factor
C) the F ratio
D) the level of the dependent variable

Find the discount date, the due date, and the complement rate. Use the complement method to find the remittance if the required remittance is paid within the discount period.A new supply company offered cash discount terms of 3/5, net 30. On January 24, a new customer purchased items with an invoice total of $738.40. Then, two days later, the customer returned $346.40 worth of the items.
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Researchers reported that for men,being unmarried increases the risk of depression.These findings were based on the medical records of 400 married men and 500 unmarried men.Since there is no random assignment,this conclusion is not justified because there may be lurking variables.Which of the following are possible lurking variables?
I: Rate of depression
II: Income
III: Type of employment
IV: Age
V: Gender

A) II,III,IV
B) III,IV
C) II,IV
D) II,III,IV,V
E) I,II,III

To test for interaction between factors A and B in a two-factor ANOVA,you use the F statistic that equals ____________________ divided by ____________________.

If the Brazilian real is valued at 1.7438 per U.S. dollar, compute the value in U.S. currency of 5,000 Brazilian reals.​