anonymous
  • anonymous
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.
Mathematics
katieb
  • katieb
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perl
  • perl
You change the 22 degrees to a z score first, then use a z table to find the probability.
MrNood
  • MrNood
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"
perl
  • perl
here is a diagram of the empirical rule http://prntscr.com/7awm4v

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MrNood
  • MrNood
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