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The sample size necessary for a 98 confidence interval

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Reference no: EM13632542

1. The sample size necessary for a 90% confidence interval to keep the maximum error to within 1/2 of a standard deviation, sigma is known but not given ______ samples

2. The sample size necessary for a 98% confidence interval within 0.02 for a proportion which has a prior population proportion estimate of 0.32 ____ samples

3. The sample size necessary for a 98% confidence interval within 0.02 for a proportion with NO prior population proportion estimate ____ samples

Reference no: EM13632542

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