ina certain country in 2013 it was thought that 50% of men 02 03 48 Son This Tes
ID: 3321190 • Letter: I
Question
ina certain country in 2013 it was thought that 50% of men 02 03 48 Son This Test:28 pls p old or older had neves been screened for prostate cances Suppose a random sample of 200 of these en shoes thut 120 of them hod never beee sae 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? what is the expeded number in the sample to say they had never been screened if 50% is the comediate? a The observed frequency of men who said they had not been screened ib (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 minto in the sample to say they had never been screened H 50% isthe correct rate is (Type an integer or a decimal. Do not round) Search the web and Windows F10 18 F7Explanation / Answer
Here' a
p = .50 <-- this is population proportion
n = 200< -- this is sample size
x = 120<-- this is obererved freq
p^ = x/n = 120/200 = .60 <-- sample proportion
a. Obseved Freq... = 120
b. Observed proportion.. = p^ = .60
c. Expected number = .50*200 = 100
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