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anonymous

  • one year ago

Daytime high temperatures in New York in February are normally distributed with an average of 30.2º and a standard deviation of 8.5º. Estimate the probability that the temperature on a given day in February is 22º or lower.

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  1. perl
    • one year ago
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    You change the 22 degrees to a z score first, then use a z table to find the probability.

  2. MrNood
    • one year ago
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    It says "estimate" 22 deg is very close to 1 SD below the mean What is the probability of a sample < 1sd below the mean? use the 68,95, 97.5 rule as a very good "estimate"

  3. perl
    • one year ago
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    here is a diagram of the empirical rule http://prntscr.com/7awm4v

  4. MrNood
    • one year ago
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    |dw:1432934404320:dw|

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