Problem: If a cognitive psychologist wants to know if sleep improves working memory, the type of hypothesis the psychologist would use is? Need Assignment Help?
Group of answer choices
- one-tailed because the study only looks at the effects of sleep and does not consider other factors.
- one-tailed because the study is only interested in whether sleep improves memory.
- two-tailed because no direction for any observed difference has been predicted.
- two-tailed because the study will have to involve both people with good and poor memories.