A researcher wants to determine the effects of sleep on memory and decides to schedule two groups of subjects for a sleep study. Both groups will be asked to memorize as many items as they can from the same prepared list of items. Then they will be allowed to go to sleep. In group A, the subjects will only be allowed to sleep for six hours. In group B, the subjects will be allowed to sleep for their usual amount of time. After each subject is finished sleeping, a quiz will be given over the list that was supposed to be memorized. What is the independent variable in the experiment?
A.
amount of sleep
B.
group B subjects
C.
memory
D.
group A subjects

Please select the best answer from the choices provided
Please help and fast I only have like 10 minutes

In 1990, the average income for an american worker was $1,518 per month. in 2000, the average income for an american worker was $2,632 per month. during this time period, a basket of necessities (food, housing, etc.) increased from $657 per month in 1990 to $1,402 per month in 2000. the real value of income ▼ increased decreased over that 10-year period.

Charles schenck was a u.s. citizen and private in the army. while in military training during world war i, schenck printed and passed out leaflets explaining why he was against the draft (required military service). he was charged with violating the espionage act of 1917, a federal law outlawing any action interfering with military operations. schenck believed the espionage act violated his right to free speech. in which court would this case ultimately be decided, and why? a state criminal court, because schenck was accused of violating a criminal law a military tribunal, because the matter involved members of the military a county civil court, because it involved violation of a civil liberty the u.s. supreme court, because schenck challenged whether the law was constitutional

Why was the pension issue relevant to the politics of cleveland's presidency?