BUAL 2650 Auburn Exam 1 Correctly Answered Latest Update
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BUAL2650
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BUAL 2650 Auburn Exam 1 Correctly Answered Latest Update
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| Uploaded on: | May 8, 2025 |
| Last updated: | May 8, 2025 |
| Number of pages: | 6 |
| Written in: | 2025/2026 |
| Type: | Exam (elaborations) |
| Contains: | Questions & Answers |
| Tags: | BUAL 2650 Auburn Exam 1 Correctly Answered Latest Update |
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BUAL 2650 Auburn Exam 1 | Q&A Latest Update 2025/2026 | 100% PASS sample proportion - Answer -sample of the population, p-hat, that we use because we do not know the parameter of the whole population, p. p=p-hat most of the time but not always standard deviation - Answer -typical difference between p and p-hat. the proportion from sample, p-hat, is not equal to p, typically the estimate p-hat will be off by the sq.rt of pq/n, confidence interval - Answer -assume symmetry, p-hat +/- 2*SD(p-hat) for 95% confidence interval, so 95/100 will contain p. conditions to check - Answer -randomization condition, 10% condition (no larger than 10% of the population), success/failure (nq >10, np>10) confidence intervals for proportions - Answer -68%- (psq.rt.pq/n,p+sq.rt.pq/n) 95%- (p-2sq.rt.pq/n,p+2sq.rt.pq/n) 99.7%- (p-3sq.rt.pq/n,p+3sq.rt.pq/n) z-score - Answer -p-hat - p / SD(p-hat) mu(0,1) standard normal distribution positive z-score - Answer -outlier > 3 is unusual negative z-score - Answer -outlier < -3 is unusual
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