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

What is the slope of the line that contains the points (4,8) and (9,8)? what type of line is it?

In the rectangle below ac=30 units what is de

At the olympic games, many events have several rounds of competition. one of these events is the men's 100-meter backstroke. the upper dot plot shows the times (in seconds) of the top 8 finishers in the final round of the 2012 olympics. the lower dot plot shows the times of the same 8 swimmers, but in the semifinal round. which pieces of information can be gathered from these dot plots? (remember that lower swim times are faster.) choose all answers that apply: a: the swimmers had faster times on average in the final round. b: the times in the final round vary noticeably more than the times in the semifinal round. c: none of the above.