Answer:
This means that we are 80% confident that the mean of the drive-through service time is between 178.0 seconds and 181.0 seconds. This conclusion was obtained after examined 576 customers. If you want a greater % of confidence you will have to lower the lower bound and increase the upper bound
Y/3.5= 25
(Hoped this help^)
Hello Shelbyhall, simply you would multiply 17.50 * 25 because 4 * 25 = 100%. Answer: 437.5 is the other 96% :)
