Researchers Determined That 60 Puffs Tissues Is the Average Number $\bar { x }$

question 4

Multiple Choice

Researchers determined that 60 Puffs tissues is the average number of tissues used during a cold. Suppose a random sample of 100 Puffs users yielded the following data on the number of tissues used during a cold: $\bar { x }$ = 52 and s = 22. Suppose the alternative we wanted to test was H₁: $\mu$ < 60. The correct rejection region for $\alpha$ = 0.05 is:

• A)reject H₀ if t > 1.6604.
• B)reject H₀ if t < -1.6604.
• C)reject H₀ if t > 1.9842 or Z < -1.9842.
• D)reject H₀ if t < -1.9842.

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