Mathematics, 12.03.2021 14:50 ashhleyjohnson

The director of the IRS has been flooded with complaints that people must wait more than 30 minutes before seeing an IRS representative. To determine the validity of these complaints, the IRS randomly selects 400 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 40 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 30 minutes at a 0.200 significance level

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The director of the IRS has been flooded with complaints that people must wait more than 30 minutes...