Answer:
A. 60
Step-by-step explanation:
We have that to find our level, that is the subtraction of 1 by the confidence interval divided by 2. So:
Now, we have to find z in the Ztable as such z has a pvalue of .
So it is z with a pvalue of , so
Now, find the margin of error M as such
In which is the standard deviation of the population and n is the size of the sample.
We have to find:
n when . So
Dividing both sides by 3
We round up, so the correct answer is:
A. 60
The answer is 18.6. The double negative (minus a negative) equals a positive. So you add 14.3 + 4.3 = 18.6
It is an opinion or conclusion based off of incomplete information
Answer:
It would be good if u could show us the picture
Answer:
a. 1.92 customer
b. 400 seconds.
c. 0.6944
Step-by-step explanation:
The system described is a waiting line type (M / M / 1) with 100s service time, that is, a service rate mu = 36 customers / hour; and a lambda arrival rate = 25 customers / hour. In this way,
a. The number of customers waiting to use the machine is: lambda ^ 2 / [mu (mu - lambda)] = (25^2) / [36 (36 - 25)] = (25^2) / (36*9) = 1.92 customers .
b. The average time a client spends in the system is: 1 / (mu - lambda) = 1 / (36 - 25) = 1/9 = 0.11 hours = 400 seconds.
c. The probability that a arriving customer should wait for the service is given by: lambda / mu = 25/36 = 0.6944.