Instructions: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. You, as a researcher wonder if Loftus and Palmer's study is reliable, and repeats this study with a sample of students and obtains the following data.

"Hit" Group

"Smashed Into" Group

25

50

25

45

34

55

30

40

36

45

37

41

31

50

35

35

30

37

35

45

30

55

25

50

20

45

25

43

30

42

24

40

34

36

33

45

37

50

38

41

1a. What is the best statistical test to use?

A. correlation test

B. t-Test for independent samples

C. t-Test for dependent samples

D. z-test

1b. Compute the test statistic. The formula is below for you.Also, remember to use the variance rather than the standard deviation in your calculation.Which of the following is the value of the test statistic you computed?

A. 4.55

B. 7.93

C. 2.50

D. 4.32

E. 18.59

1c. What is the critical value for this statistical test?(hint: you'll need your answers to the previous two questions, as well as your "level of risk"; remember, if the exact degrees of freedom aren't in the t-test table of critical values, you can choose the closest value that is there).

A. 2.02

B. 2.42

C. 1.56

D. 1.69