A New Study Has Found That,on Average,6- to 12-Year-Old Children

question 17

Multiple Choice

A new study has found that,on average,6- to 12-year-old children are spending less time on household chores today compared to 1981 levels.Suppose two samples representative of study's results report the following summary statistics for the two periods. Which of the following are the appropriate competing hypotheses?

• A) H₀: µ₁-µ₂ ≤ 0,H_A: µ₁-µ₂ > 0
• B) H₀: µ₁-µ₂ ≥ 0,H_A: µ₁-µ₂ < 0
• C) H₀: µ₁-µ₂ > 0,H_A: µ₁-µ₂ ≤ 0
• D) H₀: µ₁-µ₂ = 0,H_A: µ₁-µ₂ ≠ 0

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