A particular telephone number is used to receive both voice calls and fax messag

Question

A particular telephone number is used to receive both voice calls and fax messages. Suppose that 25% of the incoming calls involve fax messages, and consider a sample of 25 incoming calls. (Round your answers to three decimal places.)

(a) What is the probability that at most 8 of the calls involve a fax message?

(b) What is the probability that exactly 8 of the calls involve a fax message?

(c) What is the probability that at least 8 of the calls involve a fax message?

(d) What is the probability that more than 8 of the calls involve a fax message?

0/4 points | Previous Answers DevoreStat9 3.E.050 My Notes Ask Your T A particular telephone number is used to receive both voice calls and fax messages. Suppose that 25% of the incoming calls involve fax messages, and consider a sample of 25 incoming calls. (Round your answers to three decimal places.) (a) What is the probability that at most 8 of the calls involve a fax message? 0.99 (b) What is the probability that exactly 8 of the calls involve a fax message? 0.02216 (c) What is the probability that at least 8 of the calls involve a fax message? 0.0321x (d) What is the probability that more than 8 of the calls involve a fax message? 0.0099 You may need to use the appropriate table in the Appendix of Tables to answer this question Need Help? Read It Talk to a Tutor ll

Explanation / Answer

Solution:

Given information

P=0.25

n =25

this is bionomial distribution

a)P(x 8) = 0.8506

b) P(x = 8) = 0.1241

c) P(x 8) = 0.2735

d)P(x > 8) = 0.1494

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