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The amount of Jen's monthly phone bill is normally distributed with a mean of $55 and a standard deviation of $12. What's the Z Score?
The amount of Jen's monthly phone bill is normally distributed with a mean of $55 and a standard deviation of $12. What's the Z Score? What percentage of her phone bills are above 79? What percentage of her phone bills are between $31 and 79? What would be the z score and monthly bill of someone in the top 5% of monthly phone bills?
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