To follow new federal guidelines, a company implement a new procedure for quality control of their manufacturing. They wish to determine whether the time required to follow the new procedure is longer or shorter than what they've done in the past. They collect the following data on time to complete the new procedure.
159 120 480 149 270 347 340 43 228 202 240 218
Calculate the test statistic and determine the P-value. (Round your test statistic to two decimal places and your P-value to four decimal places.)
t =
P-value =
What can you conclude? is it a or B
a. There is compelling evidence that the true average time has changed from 200 min.
B. There is not compelling evidence that the true average time has changed from 200 min