Posted by tina on Wednesday, October 5, 2011 at 11:54pm.
35%of adult Americans are regular voters. A random sample of 250 adults in a mediumsize college town were surveyed, and it was found that 110 were regular voters. Estimate the true proportion of regular voters with 90% confidence and comment on your results...
Can you show you work please???

Statisics  MathGuru, Thursday, October 6, 2011 at 12:16pm
Confidence interval using proportions:
CI90 = p + or  (1.645)(√pq/n)
...where + or  1.645 represents 90% confidence using a ztable.
Note: p = 110/250 (convert to a decimal); q = 1  p; and n = 250 (sample size).
I'll let you take it from here.