The score on an exam from a certain statistics class, X, is normally distributed with u = 77.9 and o = 9.5. NOTE: Assume for the sake of this problem that the score is a continuous variable. A score can thus take on any value on the continuum. ( life, scores are often treated as if they were continuous values but are actually discrete in most cases.) Round your z-scores to 2 decimal places for this problem. Give your probabilities to 4 decimal places. (a) Write the event "a score over 67.9" in terms of X: (b) Find the probability of this event: (C) Find the probability that a randomly chosen score is greater than 87.4: (d) Find the' probability that a randomly chosen score is between 67.9 and 87.4: .
The score on an exam from a certain statistics class, X, is normally distributed with u = 77.9 and o = 9.5. NOTE: Assume for the sake of this problem that the score is a continuous variable. A score can thus take on any value on the continuum. ( life, scores are often treated as if they were continuous values but are actually discrete in most cases.) Round your z-scores to 2 decimal places for this problem. Give your probabilities to 4 decimal places. (a) Write the event "a score over 67.9" in terms of X: (b) Find the probability of this event: (C) Find the probability that a randomly chosen score is greater than 87.4: (d) Find the' probability that a randomly chosen score is between 67.9 and 87.4: .
MATLAB: An Introduction with Applications
6th Edition
ISBN:9781119256830
Author:Amos Gilat
Publisher:Amos Gilat
Chapter1: Starting With Matlab
Section: Chapter Questions
Problem 1P
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Transcribed Image Text:The score on an exam from a certain statistics class, X, is normally distributed with u =77.9 and o = 9.5.
NOTE: Assume for the sake of this problem that the score is a continuous variable. A score can thus take on any value on the continuum. (In real
life, scores are often treated as if they were continuous values but are actually discrete in most cases.)
Round your z-scores to 2 decimal places for this problem. Give your probabilities to 4 decimal places.
(a) Write the event "a score over 67.9" in terms of X
(b) Find the probability of this event:
(c) Find the probability that a randomly chosen score is greater than 87 4.
(d) Find the probability that a randomly chosen score is between 679 and 87.4
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