A new smart card is being studied for placement into a machine to improve the time it takes to perform various tasks. The following data show the time

(in minutes) taken by the machine to perform a random sample of tasks before and after the placement of the smart card. Does the card improve the performance of the machine?

Test at α=0.01. 

Transcribed Image Text:

Before After Before After 5385822 27 26 30 37 30 26 3333333 20 27 25 25 38 23 34 30 34 36 29 40 29 38 35 30 21 25 3333333 38 29