In a certain county in 2013, it was thought that 50% of men 50 years old or older had never been screened for prostate cancer. Suppose a random sample of 50 of these men shows that 20 of them had never been screened. a. What is the observed frequency of men who said they had not been screened? b. What is the observed proportion of men who said they had not been screened? c. What is the expected number in the sample to say they had never been screened if 50% is the correct rate? a. The observed frequency of men who said they had not been screened is (Type an integer or a decimal. Do not round.) b. The observed proportion of men who said they had not been screened is. (Type an integer or a decimal. Do not round.) c. The expected number in the sample to say they had never been screened if 50% is the correct rate is (Type an integer or a decimal. Do not round.)

In a certain county in 2013, it was thought that 50% of men 50 years old or older had never been screened for prostate cancer. Suppose a random sample of 50 of these men shows that 20 of them had never been screened. a. What is the observed frequency of men who said they had not been screened? b. What is the observed proportion of men who said they had not been screened? c. What is the expected number in the sample to say they had never been screened if 50% is the correct rate? a. The observed frequency of men who said they had not been screened is (Type an integer or a decimal. Do not round.) b. The observed proportion of men who said they had not been screened is. (Type an integer or a decimal. Do not round.) c. The expected number in the sample to say they had never been screened if 50% is the correct rate is (Type an integer or a decimal. Do not round.)

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Description: Question Help ▼In a certain county in 2013, it was thought that 50% of men 50 years old or older had never been screened for prostate cancer. Suppose a random sample of 50 ofthese men shows that 20 of them had never been screened.a. What is the obse

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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Concept explainers

2-Proportion Test

In a 2-proportion test, two separate proportions are measured at the same time, and their similarity is evaluated. It is also known as a 2-proportion z-test, and a comparison of two different proportions is done in this method.

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