To increase productivity, Jamba Juice employees went through a smoothie-making training program. To test whether the program was effective, a sample of seven workers was taken, with each worker's productivity recorded BEFORE andAFTER the training program. The data should be treated as:

Group of answer choices

paired samples

paired proportions

independent samples

mutually exclusive samples

If we are interested in determining whether the training program helps the employeesmake MORE smoothies per day, on average, what is the alternative hypothesis being tested?

Group of answer choices

H_A: _d < 0.0

H_A: _d > 0.0

H_A: _d = 0.0

H_A: _d 0.0