H0= H1= Determine the critical value(s) for this hypothesis test. Round the solution(s) to two decimal places. If more than one critical value exists, enter the solutions using a comma-separated list. = Determine the test statistic. Round the solution to two decimal places. =
Hospital emergency rooms (ERs) have a bad reputation for long wait times. To improve their image, many hospitals have worked hard to reduce their ER wait times and frequently advertise their improved, low ER wait times.
Lawnwood Regional Medical Center recently advertised a 4 minute or less wait time at their ER. An accreditation agency is suspicious of this low advertised wait time and would like to test the hospital's claim.
A random sample of 145 ER visits to Lawnwood Regional Medical Center was examined and the mean wait time of the sample was found to be 4.08 minutes.
Using a significance level of 0.5%, can the accreditation agency conclude that the hospital's claim about ER wait times is false? Assume that the standard deviation of the wait times of all ER visits at Lawnwood Regional Medical Center is known to be 0.46 minutes. Use the critical value method.
State the null and alternative hypothesis for this test.
H0=
H1=
Determine the critical value(s) for this hypothesis test. Round the solution(s) to two decimal places. If more than one critical value exists, enter the solutions using a comma-separated list. =
Determine the test statistic. Round the solution to two decimal places. =
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