A Paired Difference Experiment Yielded $\mathrm { n } _ { \mathrm { d } }$

question 60

Multiple Choice

A paired difference experiment yielded $\mathrm { n } _ { \mathrm { d } }$ pairs of observations. For the given case, what is the rejection region for testing $\mathrm { H } _ { 0 } : \mu _ { \mathrm { d } } = 15$ against Ha: $\mu _ { \mathrm { d } } < 15$ ?
$$\mathrm { n } _ { \mathrm { d } } = 19 , \alpha = 0.01$$

• A) \(t < 2.552\)
• B) \(t < - 2.552\)
• C) \(t < 2.861\)
• D) \(t < - 2.539\)

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