A survey of 280 homeless persons showed that 63 were veterans. Construct a 90% confidence interval for the proportion of homeless persons who are veterans. *Please show all the steps*

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A survey of 280 homeless persons showed that 63 were veterans. Construct a 90% confidence interval for the proportion of homeless persons who are veterans.


*Please show all the steps*

Answered Same DayDec 20, 2021

Answer To: A survey of 280 homeless persons showed that 63 were veterans. Construct a 90% confidence interval...

Robert answered on Dec 20 2021
128 Votes
90% Confidence Interval for p
p̂ = x
n
= 63280 = 9/40 = 0.225
Significance level = α = 1− confidence = 1 − 0.9 = 0.1
Critical z-value = zα/2 = z0.1/2 = z0.05 = 1.645 (From z table , using interpo-
lation, 1/2 th distance between 1.64 and 1.65 )
Standard error of p̂ : SE =
√
p̂× (1 −...
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