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

H0:4.4,HA:<4.4

H0:4.0,HA:>4.0H0:4.0,HA:>4.0

H0:=4.0,HA:4.0H0:=4.0,HA:4.0

H0:X=4.4,HA:X4.4H0:X=4.4,HA:X4.4