A juice company claims that drinking their pomegranate juice increases verbal memory performance in older adults.There is currently no published research on the benefits of pomegranate juice for verbal memory performance.Moreover, companies that sell pomegranate juice often like to remind people that there are no known risks associated with its consumption.To test this claim, you have30older adults drink 8oz of pomegranate juice every day for four weeks. You then test their accuracy on a commonly used verbal memory task (scores range from 0-100%). Past research indicates that older adults usually score around56.71(SD=30.12) on this task. In your sample, you find that the average accuracy on the verbal memory task is53.77(SD=29.93).

Based on the information in the question, should this be a 1-tailed or 2-tailed test?(which)

1-tailed

2-tailed

Based on the information in the question, what alpha should you use?(which)

= .05

= .01

Use the information above to solve for the following values.

_x=

Z_obt=

Z_crit=

What do you conclude?(which)

reject the null

retain the null