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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.
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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perl
 one year ago
Best ResponseYou've already chosen the best response.2You change the 22 degrees to a z score first, then use a z table to find the probability.

MrNood
 one year ago
Best ResponseYou've already chosen the best response.1It 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
 one year ago
Best ResponseYou've already chosen the best response.2here is a diagram of the empirical rule http://prntscr.com/7awm4v
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