!The Pew Research Center reports that they are only able to contact 76% of randomly selected households drawn for telephone surveys. Suppose a pollsterhas 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...9aaltZ@WSX3eCd$с4fDOr%5VtgOll6bDELLyh&7nOUj*8mOik(9<.altOIOPctrl8;◄=?1{[:.+=}Jراbackspac1erL

Given data, p=0.76q=1-p=1-0.76=0.24n=12x= the number of people successfully contacted. p(X=x)=n…

Answered: The Pew Research Center reports that…

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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Suppose 22% of students at a certain university are out of state students. A professor takes a random sample of 50 students. Let X = the number of out of state students in the sample. a. how many students are expected to be out of state? by how much does this vary? b. what is the probability that 10 will be out of state? c. what is the probability that 10 or fewer will be out of state? d. what is the probability that fewer than 10 will be out of state?
In a memory test, the test subjects are given a large number and are asked to memorize it. Historical records show that 80% of test subjects pass the test. To pass the test, a subject must exactly repeat all the digits in the number after two hours. A random sample of 625 people to take the memory test is going to be chosen. Let p be the proportion of people in the sample who pass the test. Answer the following. (If necessary, consult a list of formulas.) (a) Find the mean of P. 0 (b) Find the standard deviation of p. 0 (c) Compute an approximation for P(P >0.84), which is the probability that more than 84% of the people in the sample pass the test. Round your answer to four decimal places. 0 X
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