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Problem: A polling sample is selected by using random sampling method with the sample size n = 1005 adults of USA and population/ all adults in USA. The confidence interval for the true proportion of the American adults believes new health care bill is given as (0.44, 0.52).
Lower bound = 0.44 or 44%
Upper bound = 0.52 or 52%
Point estimate = 0.48 or 48%
Margin of error = 0.04 or 4%
Is the confidence level given ? If so, we could try to duplicate the calculations? If not, we could perhaps work backwards to find it.
Lastly summarize your results using the format below:
We can be ____%__ confident that the true population (mean or proportion) lies in the interval _______________.
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