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:

Confidence Interval

A continuum of values, obtained through the study of sample statistics, poised to contain the value of an uncharted population parameter.

Confidence Level

The confidence level is a measure of the reliability of an estimate or interval, expressed as a percentage, indicating how often the true parameter falls within the estimated range in repeated samples.

Confidence Interval

A range of values, derived from sample statistics, that is likely to contain the true value of an unknown population parameter.

Population Mean

The average of all the values in a population, representing a central point around which the values of the population are distributed.