A Schoolteacher Is Worried That the Concentration of Dangerous,cancer-Causing Radon

question 22

Multiple Choice

A schoolteacher is worried that the concentration of dangerous,cancer-causing radon gas in her classroom is greater than the safe level of 4pCi/L.The school samples the air for 36 days and finds an average concentration of 4.4pCi/L with a standard deviation of 1pCi/L.At a 5% significance level,the decision is to ________________________________________________.

• A) reject H_o;we can conclude that the mean concentration of radon gas is greater than the safe level
• B) reject H_o;we cannot conclude that the mean concentration of radon gas is greater than the safe level
• C) not reject H_o;we can conclude that the mean concentration of radon gas is greater than the safe level
• D) not reject H_o;we cannot conclude that the mean concentration of radon gas is greater than the safe level

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Definitions:

Violate Contractual Term

The act of failing to perform obligations or duties as outlined in a contract.

Tender of Performance

An offer by one party to perform their part of the contract, demonstrating readiness and willingness to fulfill the contract terms.

Contractual Obligation

A duty or commitment one party agrees to perform as outlined in a contract.

Deposit

An amount of money placed with a bank for safekeeping or as partial payment for a purchase.