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

question 39

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 critical value(s) is(are) _______.

• A) −1.690
• B) 1.690
• C) −1.96 and 1.96
• D) −2.030 and 2.030

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Definitions:

Contractual Interest Rate

The agreed-upon rate of interest that is to be applied on the principal amount of loans, bonds, or other forms of debt as specified within a contract.

Market Interest Rate

The rate of interest prevailing in the market that lenders demand and borrowers pay for funds.

Contractual Interest Rate

The agreed-upon rate of interest that is to be applied to the principal amount in a financial contract.

Discount

A reduction in the price of goods or services, typically offered to encourage purchases.