Find the mar gin al distribution of X. Find the margin al distribution of Y. Are X and Y independent? Show your work to support your answ

Students in a statistics course take their first exam and the class gets μ = 75.75 and σ = 7.75.  The distribution is normally distributed (bell curve shaped).  The professor takes all the scores and turns them into z-scores.  What is true of the new z-score distribution that the professor has made? Group of answer choices

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Roll a fair 4-sided die. X is the result. Y is that we toss a fair coin X times and count the number of tails Find the joint distribution for X and Y. Find Cov(X,Y).

Make Sure to use paired data you are conductiny a Studly for a School to See If a program they are Using is actubilly helping with test bcores.. Test the cla!m that the mean of the differences Is less than O C this means the seconed 15 Scerin higher). Use significance revel ofi12. group The date below is before /a fer Measurments of 10 Stuclents. Student 1studentz Student 3 Stydent 4 5tudent 5 589 425 Student 6 Student7 Stud-ent 8 student 9 625 632 441 615 654 684 715 く12 754 652 822 202 735 Stuelent 10. 835 887

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