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 H0; we can conclude that the mean concentration of radon gas is greater than the safe level
B) reject H0; we cannot conclude that the mean concentration of radon gas is greater than the safe level
C) not reject H0; we can conclude that the mean concentration of radon gas is greater than the safe level
D) not reject H0; we cannot conclude that the mean concentration of radon gas is greater than the safe level
Correct Answer:
Verified
Correct Answer:
Verified
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