Homework Answers
| Category | Observed Frequency (O) | Proportion, p | Expected Frequency (E) | (O-E)²/E |
| Double miles | 55 | 0.5 | 120 * 0.5 = 60 | (55 - 60)²/60 = 0.4167 |
| Standard | 30 | 0.3 | 120 * 0.3 = 36 | (30 - 36)²/36 = 1 |
| Triple miles | 35 | 0.2 | 120 * 0.2 = 24 | (35 - 24)²/24 = 5.0417 |
| Total | 120 | 1.00 | 120 | 6.4583 |
Test statistic:
χ² = ∑ ((O-E)²/E) = 6.4583
df = n-1 = 2
p-value = CHISQ.DIST.RT(6.4583, 2) = 0.0396 = 0.04
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