t value lies between (2,3) so, answer is option d
Answer:
good to know. but what's the question?
Answer:
140
Step-by-step explanation:
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
