Solution:
Given:
x = 48 ,n = 97
c = confidence level= 99.9%
Part a) Point estimate:
Part b) Standard Error :
Part c) 99.9% confidence interval:
where
E = Margin of Error
Zc is z critical value for c = 0.999 confidence level.
Find Area = ( 1+c)/2 = ( 1 + 0.999 ) / 2 = 1.999 /2 = 0.9995
Thus look in z table for Area = 0.9995 or its closest area and find corresponding z critical value.
Area 0.9995 corresponds to 3.2 and 0.09 , thus z = 3.29
that is: Zc = 3.29
Thus
Thus
( Round answer to specified number of decimal places)
1 2 3 4 900 Question 12 of 18 (point) Attempt 1 of Unlimited 7.3 Section...
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