Standard Error (a) n = 22, π = .45 (b) n = 45, π = .18 (c) n = 110, π = .16 (d) n = 547, π = .003
standard error

| n | pi | standard error |
| 22 | 0.45 | 0.106066017 |
| 45 | 0.18 | 0.057271284 |
| 110 | 0.16 | 0.034954516 |
| 547 | 0.003 | 0.002338377 |
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