Scores on a test of depth perception have a mean of 200 and a standard deviation of
Question:
a. Is a score of 260 unusually high? Explain.
b. What is the z score corresponding to 185?
c. Assuming that the scores have a bell-shaped distribution, what does the empirical rule say about the percentage of scores between 120 and 280?
d. What is the mean after 20 points have been added to every score?
e. What is the standard deviation after 20 points have been added to every score?
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In general z x o Here 200 and 40 a z 260 260 20040 6040 ...View the full answer
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Saud Ur Rehman
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