Computing minimum sample size

Reference no: EM1394246

A researcher wished to estimate, with 90% confidence, the percentage of adults who support abolishing the penny. His estimate must be accurate with in 2% of the true proportion.

1. Find the minimum sample size needed using a prior study that found that 36% of the respondents said they support abolishing the penny.

2. No preliminary estmates is available. Find the minimum sample size needed.

Reference no: EM1394246

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