Your company is evaluating two cloud-based, secured data storage services. "Pie in the Sky," the newer service, claims its uploading and downloading speeds are faster than the older service, "Cloudy but Steady Skies." You need to make a decision based on published access times for both services at different times and for varying file sizes. Your alternative hypothesis is ___. A) $\sigma$₁²

Question

Your company is evaluating two cloud-based, secured data storage services. "Pie in the Sky," the newer service, claims its uploading and downloading speeds are faster than the older service, "Cloudy but Steady Skies." You need to make a decision based on published access times for both services at different times and for varying file sizes. Your alternative hypothesis is ___. A) $\sigma$₁² < $\sigma$₂² B) $\mu$₁ - $\mu$₂ < 0 C) π₁ - π₂ = 0 D)$\mu$₁ - $\mu$₂ = 0 E) s₁ - s₂ = 0

Quizplus · Accepted Answer

The alternative hypothesis should state the difference between the means of the access times for the two services. Choice B defines a hypothesis testing problem where the null hypothesis is that the mean access times for both services are equal and the alternative hypothesis is that the mean access time for "Pie in the Sky" is less than the mean access time for "Cloudy but Steady Skies." This is shown by subtracting the mean access time for "Cloudy but Steady Skies" from the mean access time for "Pie in the Sky."

Your Company Is Evaluating Two Cloud-Based, Secured Data Storage Services σ\sigmaσ

Your Company Is Evaluating Two Cloud-Based, Secured Data Storage Services $\sigma$