Question

Problem 4

An important feature of modern tablets is battery life. Here, we wish to compare how tow popular tablets brands perform in this area. You collect a sample of 16 Ipad tablets and 13 Surface tablets. The ipad sample had a mean of 600 minutes of battery life, with a standard deviation of 6.88 minutes. Meanwhile, the Surface sample had a mean of 625 minutes and a standard deviation of 6.03 minutes. We wish to know if the Ipad tablets have a higher variance in battery life than the Surface tablets. Battery life has a normal distribution in both populations, and you are asked to use α = 0.05.

What is your conclusion?

Select one:

a. The variance of the battery life of the Ipad is lower (or equal) than that of the Surface

b. The variance of the battery life of the Ipad is lower than that of the Surface

c. The variance of the battery life of the Ipad is greater (or equal) than that of the Surface

d. The variance of the battery life of the Ipad is greater than that of the Surface

Answer 1