In a survey of style=”color:rgb(0,0,0);”>6000 women 3431 say they change their nail polish
In a survey of style=”color:rgb(0,0,0);”>6000 women 3431 say they change their nail polish once a week3431 say they change their nail polish once a week.99% confidence interval for the population proportion of women who change their nail polish once a week.
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