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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 Multiple Choice Ho : μ s4.0, Ha : μ > 4.0 O444 H,124.4,Ha : μ < 4.4 Ho : μ = 4.0, HA : μ * 4.0

math   Statistics-And-Probability   
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Answer #1

Answer : Option ( 1 )

Null and Alternative Hypotheses

H0: μ ≤ 4.0 : HA:μ > 4.0

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