# Thread: Need Help with statistics case

1. ## Need Help with statistics case

I have attached the case description.

I do not know how to start solving this case.

4.1. The group would like to further study the process before instituting any changes. If a sample of 50 cus­tomers is selected on a given day, what is the probabil­ity that
a. fewer than 3 customers would receive a free newspaper?
b. between 2 and 4 customers (inclusive) would receive a free newspaper?
c. more than 5 customers would receive a free news­paper?
4.2. If the process of delivering newspapers could be improved so that only 5% of the customers did not receive delivery by 7 A.M., what would be the probability that in a sample of 50 customers
a. fewer than 3 customers would receive a free news­paper?
b. between 2 and 4 customers (inclusive) would receive a free newspaper?
c. more than 5 customers would receive a free newspaper?

Appreciate any help !!

Thank You.

2. Originally Posted by bhuvan
I have attached the case description.

I do not know how to start solving this case.

4.1. The group would like to further study the process before instituting any changes. If a sample of 50 cus­tomers is selected on a given day, what is the probabil­ity that
a. fewer than 3 customers would receive a free newspaper?
b. between 2 and 4 customers (inclusive) would receive a free newspaper?
c. more than 5 customers would receive a free news­paper?
4.2. If the process of delivering newspapers could be improved so that only 5% of the customers did not receive delivery by 7 A.M., what would be the probability that in a sample of 50 customers
a. fewer than 3 customers would receive a free news­paper?
b. between 2 and 4 customers (inclusive) would receive a free newspaper?
c. more than 5 customers would receive a free newspaper?

Appreciate any help !!

Thank You.
Use the binomial distribution.

4.1 n = 50, p = 0.07.

4.2 n = 50, p = 0.05.

3. Thank you for your Help ..

4. I understand the problem but i am confuse in below.

does "fewer" mean 3 or 2? what rationale applies to the term "inclusive" ??

Appreciate your reply.

5. Originally Posted by bhuvan
I understand the problem but i am confuse in below.

does "fewer" mean 3 or 2? what rationale applies to the term "inclusive" ??

Appreciate your reply.
I would have thought that fewer than 3 meant 0, 1 or 2.

6. "fewer than 3 " mean less than 3 P(X < 3)?