A resercher wishes to estimate with 90 confidence the

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Reference no: EM13611052

A resercher wishes to estimate, with 90% confidence, the proportion of adults who have high-speed internet access. Her estimate must be accurate within 4% of the true proportion.

a) What is the minimum sample size needed using a prior study of 52% of the respondents said they have high-speed internet access?

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

Reference no: EM13611052

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