The Pew Research Center reports that they are only able to contact 76% of randomly selected households drawn for telephone surveys. Suppose a pollster has a list of 12 calls to make. Let X- the number of people successfully contacted. Round to the nearest hundredths, O.XX. a) Find the probability that exactly 9 of the calls are successful. P(X=9)= type your answer.... b) At most 9 calls are successful. P(X ≤9)= type your answer..... c) At least 9 calls are successful. P(X29)= type your answer...
The Pew Research Center reports that they are only able to contact 76% of randomly selected households drawn for telephone surveys. Suppose a pollster has a list of 12 calls to make. Let X- the number of people successfully contacted. Round to the nearest hundredths, O.XX. a) Find the probability that exactly 9 of the calls are successful. P(X=9)= type your answer.... b) At most 9 calls are successful. P(X ≤9)= type your answer..... c) At least 9 calls are successful. P(X29)= type your answer...
A First Course in Probability (10th Edition)
10th Edition
ISBN:9780134753119
Author:Sheldon Ross
Publisher:Sheldon Ross
Chapter1: Combinatorial Analysis
Section: Chapter Questions
Problem 1.1P: a. How many different 7-place license plates are possible if the first 2 places are for letters and...
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The Pew Research Center reports that they are only able to contact 76% of randomly selected households drawn for telephone surveys. Suppose a pollster
has a list of 12 calls to make. Let X= the number of people successfully contacted. Round to the nearest hundredths, O.XX.
a) Find the probability that exactly 9 of the calls are successful.
P(X=9)= type your answer....
b) At most 9 calls are successful.
P(X≤9)= type your answer...
c) At least 9 calls are successful.
P(X29)= type your answer...
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