3. The alkalinity level of water specimens collected from a certain river is approximatelydistributed as normal with a mean of 50 miligrams per liter and a standard deviationof 2.5 miligrams per liter.i. Find the probability that a water specimen collected from the river has analkalinity level below 54 miligrams per liter.ii. If a sample of 20 specimens are collected from the river, what is the probabilitythat the mean alkalinity level is between 49.5 and 51.5 miligrams per liter?Answer

Given,sample size(n)=20mean(μ)=50standard deviation(σ)=2.5

Answered: 3. The alkalinity level of water…

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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