Find the following probabilities for test scores X, for which the mean is 400 and the standard deviation is 90. Assume that the test scores are described by a normal curve. (Round all answers to four decimal places.) (a) P(X less than or equal to 400). (b) P(X less than or equal to 490). (c) P(X greater than or equal to 580).
Find the following probabilities for test scores X, for which the mean is 400 and the standard deviation is 90. Assume that the test scores are described by a normal curve. (Round all answers to four decimal places.) (a) P(X less than or equal to 400). (b) P(X less than or equal to 490). (c) P(X greater than or equal to 580).
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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Find the following probabilities for test scores X, for which the
(a) P(X less than or equal to 400).
(b) P(X less than or equal to 490).
(c) P(X greater than or equal to 580).
(d) P(400 less than or equal to X less than or equal to 580).
(b) P(X less than or equal to 490).
(c) P(X greater than or equal to 580).
(d) P(400 less than or equal to X less than or equal to 580).
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