Warren Chan
09/02/2024 · Middle School
2. The norms for a standardized mathematics test, assumed to ba normally dstributed, are as follows: - National norms \( \bar{x}=75 \quad s=12 \) - Large-aty norms \( \bar{x}=68 \quad s=15 \) John has a scora of 80, and Mary has a score of 65 - What are thair Pracentile ranks in terms of the national norms? in terms of the Large - city narms?
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John's percentile rank is 66.4% under national norms and 79.2% under large-city norms. Mary's percentile rank is 20.2% under national norms and 42.0% under large-city norms.
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