Assume that the mean length of time required to complete the…

Assume that the mean length of time required to complete the Columbus Marathon is 4.5 hours and that the standard deviation of the times required to complete the race is 0.70 hours.  Calculate the z-score for a time of 2.3 hours.  Based on the z-score, is this time of 2.3 hours an outlier?

This test contains the password to your online exam as well…

This test contains the password to your online exam as well as instructions to follow and submit your written work.  Please DO NOT SUBMIT OR CLOSE this test until you have completed your online exam and and answered all four questions.WARNING: If work is not uploaded in a cropped single pdf, or if work is not in order, neatly written, it will not receive credit (-9 points for each problem). WORK FOR EVERY PROBLEM: Every single problem (even the ones that look like you don’t need to write much) must have written reasoning/steps to support the answer you give in Knewton.  Failure to show work will result in a score of 0 for that problem.