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

question 4

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.To test whether the average level of radon gas is greater than the safe level,the appropriate hypotheses are _____________________.

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Definitions:

News Narrative

A structured representation of news events and contexts, often highlighting the sequence and relationship of these events.

Rejection Region

The range of values for which the null hypothesis is not considered plausible and is rejected in hypothesis testing.

Radio Listening

The activity or measure of how many people listen to radio broadcasts within a given period or demographic.

Population Standard Deviation

A measure of the dispersion or spread of a set of data points in a population from its mean, indicating how widely the data points are scattered.