Question 621434
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Hi,
In a survey of 9000 women, 6431 sy they change their nail polish once a week.
 Construct a 90% confidence interval for the population proportion of women who change their nail polish once a week.
 p = 6431/9000 = .715   and q = .285
ME = 1.645{{{sqrt((.715*.285)/9000)}}}
<span style="text-decoration: overline">X</span>  = 6431
  6431 - ME < {{{mu}}} < 6431 + ME