In 1974, Loftus and Palmer conducted a classic study demonstrating how the language used to ask a question can influence eyewitness memory. In the study, college students watched a film of an automobile accident and then were asked questions about what they saw. One group was asked, "About how fast were the cars going when they smashed into each other?" Another group was asked the same question except the verb was changed to "hit" instead of "smashed into". The "smashed into" group reported significantly higher estimates of speed than the "hit" group. Suppose a researcher repeats this study with a sample of today's college students and obtains the results shown below. Using an independent-samples t-test with an alpha of 0.05, two-tailed, is there enough evidence to support that there is a significant difference in speed estimates in the 2 conditions? Make sure to run an entire hypothesis test, including a measure of effect size and writing the results in APA style.
Estimated Speed
Smashed into
n=15
Mean=40.8
s^2=36.43
Hit
n=15
Mean=34
s^2=29.57