please answer all parts of the question (this is one big question) also please r

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please answer all parts of the question (this is one big question) also please round proerly based on what the question asks: and bold all answers when done (make it so i can follow easily)- this one happens to be very long but please go in order and bold final answer (round based on what it asks)

This Question: 1 pt 12 of 14 (0 complete) This Quiz: 14 pts possible A group of 8 students were given the same standardized test twice to see whether retaking the test affected the score. The table gives the score improvements for the 8 students. Complete parts a through e. -40 40 60 90 60 20 20 -50 a. Identify the variable under consideration. Choose the correct answer below. O A. Paired-score difference O B. Mean paired-score difference O C. Score O D. Mean score b. Identify the two populations. Choose the correct answer below. A. The students taking the first test and the students taking the second test (retake) 0 B. Mean scores for the first test and mean scores for the second test (retake) ° C. Scores on the first test and scores on the second test (retake)

Explanation / Answer

a) pair score difference

b) the students taking first test and student taking second test

c) score on second test (retake) - score on first test

d) yes

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