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: = 52 and s = 22.Suppose the alternative we wanted to test was H₁: μ 1.6604. B)reject H₀ if t 1.9842 or Z

Question

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: = 52 and s = 22.Suppose the alternative we wanted to test was H₁: μ < 60.The correct rejection region for α = 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.

Quizplus · Accepted Answer

Since the alternative hypothesis is that the population mean is less than 60, we have a one-tailed test. For a one-tailed t-test with α = 0.05 and 99 degrees of freedom, the correct rejection region is t < -1.6604. Therefore, we reject the null hypothesis H₀ if t < -1.6604. Therefore, the best choice is option B.

Researchers Determined That 60 Puffs Tissues Is the Average Number