What is the probability that the third fly checked is the first one with white eyes?
6. Suppose that the probability is 0.30 that achild who is exposed to chicken pox will catch it.
Also assume that it is reasonable to treat the results for each child as independent.
Suppose that 8 children are exposed to chicken pox. and letX equal the number of
children out of the 8 that actually contract the disease.
a. What kind of distribution does X have? Clearly explain why it satisfies all conditions for
b. What is the probability that ‘2 or fewer of the 8 children contract the disease?
c. On average, if 8 children are exposed to chicken pox. how many would you expect to
contract the disease?
7. In a genetics class. some biology students were asked to check the eye color of a large number
of fruit flies. Based on theoretical considerations from genetics. they expected that 30’: of
the fruit flies would have red eyes and 54’: would have white eyes. They also believe that
the eye colors of different flies are independent of one another.
In each part of the problem, clearly identify which distribution you are using and
briefly explain why you chase that distribution.
a. What is the probability that the third fly checked is the first one with white eyes?
b. What is the probability that the at least one of the first three flies checked will have white
c. What is the probability that they will need to check more than 3 flies to find one with white
d. What is the probability that exactly 8 of the first 10 flies checked have red eyes?
e. What is the probability that at least 8 of the first 10 flies checked have red eyes?
f. On average. how many flies out of 10 would you expect to have red eyes?
g. What is the probability that the tenth fly checked will be the sixth one with red eyes?
8. A slight modification of the scenario from exercise #6 above: Suppose that the students start
with a group of 40 fruit flies. 30 of which have red eyes and 10 of which have white eyes.
The students then randomly select 10 of the 40 flies. Let Y = the number of flies with red eyes
in the students‘ sample.
a. What kind of distribution does Y have? Why? Make sure that you specify the values of all
b. What is the probability that exactly 8 of 10 flies checked have red eyes?
c. What is the probability that at least 8 of 10 flies checked have red eyes?
d. On average. how many flies out of 10 would you expect to have red eyes?
e. How do the answers to (b) through (d) compare with the answers to (d) through (0 in
Our Service Charter
Excellent Quality / 100% Plagiarism-FreeWe employ a number of measures to ensure top quality essays. The papers go through a system of quality control prior to delivery. We run plagiarism checks on each paper to ensure that they will be 100% plagiarism-free. So, only clean copies hit customers’ emails. We also never resell the papers completed by our writers. So, once it is checked using a plagiarism checker, the paper will be unique. Speaking of the academic writing standards, we will stick to the assignment brief given by the customer and assign the perfect writer. By saying “the perfect writer” we mean the one having an academic degree in the customer’s study field and positive feedback from other customers.
Free RevisionsWe keep the quality bar of all papers high. But in case you need some extra brilliance to the paper, here’s what to do. First of all, you can choose a top writer. It means that we will assign an expert with a degree in your subject. And secondly, you can rely on our editing services. Our editors will revise your papers, checking whether or not they comply with high standards of academic writing. In addition, editing entails adjusting content if it’s off the topic, adding more sources, refining the language style, and making sure the referencing style is followed.
Confidentiality / 100% No DisclosureWe make sure that clients’ personal data remains confidential and is not exploited for any purposes beyond those related to our services. We only ask you to provide us with the information that is required to produce the paper according to your writing needs. Please note that the payment info is protected as well. Feel free to refer to the support team for more information about our payment methods. The fact that you used our service is kept secret due to the advanced security standards. So, you can be sure that no one will find out that you got a paper from our writing service.
Money Back GuaranteeIf the writer doesn’t address all the questions on your assignment brief or the delivered paper appears to be off the topic, you can ask for a refund. Or, if it is applicable, you can opt in for free revision within 14-30 days, depending on your paper’s length. The revision or refund request should be sent within 14 days after delivery. The customer gets 100% money-back in case they haven't downloaded the paper. All approved refunds will be returned to the customer’s credit card or Bonus Balance in a form of store credit. Take a note that we will send an extra compensation if the customers goes with a store credit.
24/7 Customer SupportWe have a support team working 24/7 ready to give your issue concerning the order their immediate attention. If you have any questions about the ordering process, communication with the writer, payment options, feel free to join live chat. Be sure to get a fast response. They can also give you the exact price quote, taking into account the timing, desired academic level of the paper, and the number of pages.