We want to estimate the true pH of a test tube of solution. The pH meter is known to have a standard deviation of 0.15. The margin of error for the pH of the solution must be no larger than 0.05, with 99% confidence. How many times should the pH be measured?

We want to estimate the true pH of a test tube of solution. The pH meter is known to have a standard deviation of 0.15. The margin of error for the pH of the solution must be no larger than 0.05, with 99% confidence. How many times should the pH be measured?

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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Calculate the % approximate error relative to the true value of the area of a trapezoidal lot whose longer base is 12 m longer than the shorter base which is 10 m , and height of 20 m. There is no height deviation while each base is deviated 0.05 m below the value of each base.