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At a very competitive post-secondary school. the application pool has been analyzed to have a mean mark of 89 and a standard deviation of 4.

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At a very competitive post-secondary school. the application pool has been analyzed to have a mean mark of 89 and a standard deviation of 4. [3T/3A] a) Determine the z-score for a mark of 80. Describe its meaning. b) What percentage of marks are greater than 91? c) What mark does one need to be in the 95th percentile

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