The director of the IRS has been flooded with complaints that people must wait more than 20 minutes before seeing an IRS representative. To determine the validity of these complaints, the IRS randomly selects 300 people entering IRS offices across the country and records the times which they must wait before seeing an IRS representative. The average waiting time for the sample is 30 minutes with a standard deviation of 15 minutes. Is there overwhelming evidence to support the claim that the wait time to see an IRS representative is more than 20 minutes at a 0.050 significance level? Step 1 of 3 : Find the value of the test statistic. Round your answer to three decimal places, if necessary.
The director of the IRS has been flooded with complaints that people must wait more than 20 minutes before seeing an IRS representative. To determine the validity of these complaints, the IRS randomly selects 300 people entering IRS offices across the country and records the times which they must wait before seeing an IRS representative. The average waiting time for the sample is 30 minutes with a standard deviation of 15 minutes. Is there overwhelming evidence to support the claim that the wait time to see an IRS representative is more than 20 minutes at a 0.050 significance level? Step 1 of 3 : Find the value of the test statistic. Round your answer to three decimal places, if necessary.
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