Answered: Based on today's, it can be assumed…

A First Course in Probability (10th Edition)

10th Edition

ISBN:9780134753119

Author:Sheldon Ross

Publisher:Sheldon Ross

Chapter1: Combinatorial Analysis

Section: Chapter Questions

Problem 1.1P: a. How many different 7-place license plates are possible if the first 2 places are for letters and...

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Question

Based on today's, it can be assumed that the oil concentrations in randomly selected discharges of
production water that escapes into the sea is normally distributed with expectation µ = 21.6 mg/l and
standard deviation σ = 3.4 mg/l.
a) The authorities require that the oil concentration in production water that is released into the sea must
be less than 30 mg/l. Find the probability that a randomly chosen emission exceeds
the authorities' requirements.
What is the probability that a randomly selected discharge is less than 25 mg/l?

Features Features Normal distribution is characterized by two parameters, mean (µ) and standard deviation (σ). When graphed, the mean represents the center of the bell curve and the graph is perfectly symmetric about the center. The mean, median, and mode are all equal for a normal distribution. The standard deviation measures the data's spread from the center. The higher the standard deviation, the more the data is spread out and the flatter the bell curve looks. Variance is another commonly used measure of the spread of the distribution and is equal to the square of the standard deviation.

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