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2. A survey found that out of 900 workers, 150 said that they were interrupted by frank phone calls. Find the 95% confidence interval of the population proportion of workers who are interrupted by these calls.

2. A survey found that out of 900 workers, 150 said that they were interrupted by frank phone calls. Find the 95% confidence interval of the population proportion of workers who are interrupted by these calls.

A First Course in Probability (10th Edition)
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 !

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
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
2. A survey found that out of 900 workers, 150 said that they were interrupted by frank phone calls. Find the 95% confidence interval of the population proportion of workers who are interrupted by these calls.
Transcribed Image Text:2. A survey found that out of 900 workers, 150 said that they were interrupted by frank phone calls. Find the 95% confidence interval of the population proportion of workers who are interrupted by these calls.
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