Mathematics, 09.11.2020 16:20, nell1234565

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. The average wait time for the sample is 40 minutes with standard deviation of 15 minutes. Is there overwhelming evidence to support the claim that the wait time to see an IRS representative is more than30 minutes at a 0.200 significance level? Step 1: Find the value of the test statistic. Round your answer to three decimal places

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