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Completed 7 out of 12 | Resources Submit All Press esc to exit full screen Question 3 of 12 > An analyst at a state's environmental quality commission has just finished processing salt concentration tests on 60 wells in Washington County to represent the more than 1,000 wells across the state. Water with salinity concentration less than 0.05% is considered fresh. The analyst decides to run a one-sample t test at a significance level of a = 0.03 on this sample of wells to determine if the overall salt concentration of the state's water supply exceeds 0.05%. The shape of the sample data is approximately symmetric with no outliers, and its statistics are x = 0.048% Sz = 0.0366% P-value = 0.0166 where x is the sample mean, s, is the sample standard deviation, and the P-value is the probability that results from the 1 test. The analyst decides that there is enough evidence to conclude that the mean water salinity level exceeds 0.05%. Is this decision valid? To answer this question, complete the following sentence. The conclusion is invalid - because all of the conditions for inference have been met the Normal/Large Counts condition is not met the Random condition is not met

Completed 7 out of 12 | Resources Submit All Press esc to exit full screen Question 3 of 12 > An analyst at a state's environmental quality commission has just finished processing salt concentration tests on 60 wells in Washington County to represent the more than 1,000 wells across the state. Water with salinity concentration less than 0.05% is considered fresh. The analyst decides to run a one-sample t test at a significance level of a = 0.03 on this sample of wells to determine if the overall salt concentration of the state's water supply exceeds 0.05%. The shape of the sample data is approximately symmetric with no outliers, and its statistics are x = 0.048% Sz = 0.0366% P-value = 0.0166 where x is the sample mean, s, is the sample standard deviation, and the P-value is the probability that results from the 1 test. The analyst decides that there is enough evidence to conclude that the mean water salinity level exceeds 0.05%. Is this decision valid? To answer this question, complete the following sentence. The conclusion is invalid - because all of the conditions for inference have been met the Normal/Large Counts condition is not met the Random condition is not met

Glencoe Algebra 1, Student Edition, 9780079039897, 0079039898, 2018
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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E 3 of 12 Questions Completed 7 out of 12 Resources Submit All Press esc to exit full screen 1 Question Question 3 of 12 > An analyst at a state's environmental quality commission has just finished processing salt concentration tests on 60 wells in 2 Question Washington County to represent the more than 1,000 wells across the state. Water with salinity concentration less than 0.05% is considered fresh. 3 Question 0.03 on this sample of wells to determine if the overall salt concentration of the state's water supply exceeds 0.05%. The shape of the sample data is approximately symmetric The analyst decides to run a one-sample t test at a significance level of a = 4 Question with no outliers, and its statistics are 5 Question x = 0.048% Sx = :0.0366% 6 Question P-value :0.0166 7 Question where 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 decision valid? To answer this question, complete the following sentence. 8 Question 9 Question The conclusion is invalid , because 10 Question all of the conditions for inference have been met 11 Question the Normal/Large Counts condition is not met the Random condition is not met 12 Question
Transcribed Image Text:E 3 of 12 Questions Completed 7 out of 12 Resources Submit All Press esc to exit full screen 1 Question Question 3 of 12 > An analyst at a state's environmental quality commission has just finished processing salt concentration tests on 60 wells in 2 Question Washington County to represent the more than 1,000 wells across the state. Water with salinity concentration less than 0.05% is considered fresh. 3 Question 0.03 on this sample of wells to determine if the overall salt concentration of the state's water supply exceeds 0.05%. The shape of the sample data is approximately symmetric The analyst decides to run a one-sample t test at a significance level of a = 4 Question with no outliers, and its statistics are 5 Question x = 0.048% Sx = :0.0366% 6 Question P-value :0.0166 7 Question where 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 decision valid? To answer this question, complete the following sentence. 8 Question 9 Question The conclusion is invalid , because 10 Question all of the conditions for inference have been met 11 Question the Normal/Large Counts condition is not met the Random condition is not met 12 Question
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