Choose the Hypotheses That Can Be Tested Using Paired-Samples T

question 33

Multiple Choice

Choose the hypotheses that can be tested using paired-samples t tests. ​

• A) People living in warm countries are happier than people from cold countries.
• B) Homicide rates, on average, are higher in Western counties than in Southern counties of the United States.
• C) Graduates had higher average salaries 10 years after the graduation than they had 5 years after the graduation.
• D) The length of life, on average, is shorter for never-married persons than for married persons who married at least once.

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