Find the minimum sample size needed using a prior study

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A researcher wishes to estimate, with 90% confidence, the proportion of adults who have high speed internet access. Her estimate must be accurate within 5% of the true proportion.

Find the minimum sample size needed, using a prior study that found that 54% of the respondents said they have high speed internet access.

What is the minimum sample size needed assuming that no preliminary estimate is available?

Reference no: EM13618172

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