Unfortunately, arsenic occurs naturally in some ground water. A mean arsenic level of u = 8 partsper billion (ppb) is considered safe for agricultural use. A well in Los Banos is used to water cottoncrops. This well is tested on a regular basis for arsenic. A random sample of 37 tests gave a samplemean of= 7.3ppb arsenic. It is known that o = 1.9 ppb for this type of data. Does thisinformation indicate that the mean level of arsenic in this well is less than 8 ppb? Use the classicalapproach. Use a = 0.01What is the Decision (step 5) for this problem?There is not sufficient evidence at the 0.01 level of significance to show the mean arsenic level in the LosBanos well is less than 7.3 ppb.O There is sufficient evidence at the 0.01 level of significance to show the mean arsenic level in the Los Banoswell is less than 8.0 ppb.There is not sufficient evidence at the 0.01 level of significance to show the mean arsenic level in the LosBanos well is less than 8.0 ppb.O There is sufficient evidence at the 0.01 level of significance to show the mean arsenic level in the Los Banoswell is less than 7.3 ppb.

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Description: Unfortunately, arsenic occurs naturally in some ground water. A mean arsenic level of u = 8 partsper billion (ppb) is considered safe for agricultural use. A well in Los Banos is used to water cottoncrops. This well is tested on a regular basis for

the hypothesis is H0 : μ = 8 H1 : μ<8 we do not have the population standard deviation hence we…

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lion (ppb) is considered safe for agricul- This well is tested on a regular basis fc of - = 7.3ppb arsenic. It is known tha nation indicate that the mean level of a ach. Use a = 0.01

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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