Given two independent random samples with the following results:
n1=639 x1=347 n2=393 x2=93
Use this data to find the 95% confidence interval for the true difference between the population proportions.
Step 3 of 4: Find the value of the standard error. Round your answer to three decimal places.
Step 4 of 4: Construct the 95% confidence interval. Round your answers to three decimal places.
some necessary calculation;-
z critical value for 95% confidence level be:-
3). the standard error be:-
4).the 95% confidence interval be:-
[ from more accurate calculation i am using standard error rounded off to 5 decimal places]
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