E 3 of 12 QuestionsCompleted 7 out of 12ResourcesSubmit AllPress esc to exit full screen1 QuestionQuestion 3 of 12>An analyst at a state's environmental quality commission has just finished processing salt concentration tests on 60 wells in2 QuestionWashington County to represent the more than 1,000 wells across the state. Water with salinity concentration less than 0.05% isconsidered fresh.3 Question0.03 on this sample of wells to determine if theoverall salt concentration of the state's water supply exceeds 0.05%. The shape of the sample data is approximately symmetricThe analyst decides to run a one-sample t test at a significance level of a =4 Questionwith no outliers, and its statistics are5 Questionx = 0.048%Sx =:0.0366%6 QuestionP-value:0.01667 Questionwhere x is the sample mean, sz is the sample standard deviation, and the P-value is the probability that results from the t test.The analyst decides that there is enough evidence to conclude that the mean water salinity level exceeds 0.05%. Is this decisionvalid? To answer this question, complete the following sentence.8 Question9 QuestionThe conclusion isinvalid , because10 Questionall of the conditions for inference have been met11 Questionthe Normal/Large Counts condition is not metthe Random condition is not met12 Question

Given that We have to find the conclusion

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Glencoe Algebra 1, Student Edition, 9780079039897, 0079039898, 2018

18th Edition

ISBN:9780079039897

Author:Carter

Publisher:Carter

Chapter10: Statistics

Section10.3: Measures Of Spread

Problem 1GP

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The American Water Works Association reports that, The average household water usage is more than 10 gallons per day. However, in a pandemic like this, it is suspected that there is a change in household water consumption. A researcher conducted a survey and took samples of 12 household heads and asked about the use of the gallon water. The data obtained are as follows: 74, 8, 13, 17, 13, 15, 12, 13, 15, 16, 9, 7. If it is known that the data is normally distributed. Use a significance level of 5% to test whether the average household water use has increased (greater than 10 gallons)? What will happen if the household's water use increases by 5% from the previous one? Analyze your answer and come up with a conclusion!
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