8. 02 points 24 Submissions Used My Notes Ask Your Teach A particular telephone

Question

8. 02 points 24 Submissions Used My Notes Ask Your Teach 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 answers to three decimal places.) Round your (a) What is the probability that at most 7 of the calls involve a fax message? 0 6368 x (b) What is the probability that exactly 7 of the calls involve a fax message? 0.1733 (c) What is the probability that at least 7 of the calls involve a fax message:? (d) What is the probability that more han 7 of the calls inolve a fax message

Explanation / Answer

a) Use excel function

BINOM.DIST(7,25,0.25,TRUE)

= 0.727

b) Use excel function

BINOM.DIST(7,25,0.25,FALSE)

= 0.165

c) Use excel function

1-BINOM.DIST(6,25,0.25,TRUE)

= 0.439

d) Use excel function

1-BINOM.DIST(7,25,0.25,TRUE)

= 0.273

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