A researcher was interested in the relationship between caffeine consumption and short term memory. He randomly divided a group of participants into two groups. One group consumed 8 ounces of full-caffeine coffee while the other group consumed 16 ounces. After drinking the coffee and waiting ten minutes, each participant read a story and were then asked various questions about the story. The data below indicates the amount of questions each participant answered correctly. One person from the 8 ounce group halted the experiment. Perform a t test and compose a conclusion about the impact of caffeine on memory.