1. In a poll of 2,500 likely voters, 966 say that the Philippines spend too little on education. Find the 90% confidence interval of the true proportion of voters who feel this way.
1. In a poll of 2,500 likely voters, 966 say that the Philippines spend too little on education. Find the 90% confidence interval of the true proportion of voters who feel this way.
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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write your answers legibly and follow the formulas indicated on the picture. thank you !
Transcribed Image Text:1. In a poll of 2,500 likely voters, 966 say that the Philippines spend too little on education.
Find the 90% confidence interval of the true proportion of voters who feel this way.
Transcribed Image Text:ormulae
sample eize
Z z seore
g alpha
Ō= standard dev
E =
2.
n =
95% =1.960
99% =2.575
error
for proportion 2
^^
n= pq l Ē
%3D
n=s ample rite
p-hat lpropor tion)
( l-p)
21 =' (901.,9s1.,99.%.)
Use 0.5
iF P is not
hat
E =
eror
2
E = ?¢ V
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