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Data: For homes that sold in the past year, the average number of days on the market (DOM) was 266 days. During this time, DOM was normally distributed with a standard deviation of 12 days. The Carmichaels sold their house in 245 days.
Instruction: Using the Unit Normal Table, answer what percentage of homeowners:
a. sold their home at the same point or earlier than the Carmichaels?
b. sold their home at a later point than the Carmichaels?
c. sold their home between 245 days and the average DOM?
The relative frequency distribution of the number of TVs sold in a day in a department store in the last year is as follows: Compute the mean and standard deviation of this distribution.
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Bill heats his house with natural gas. The gas usage is measured in therms (T). In January of 2007 he used 125 therms over 34 days (D) and the average temperature (T) was 49 degrees farenheit.
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Assume a Normal Distribution with mean µ = 98.7 and IQR = 0.50. Find the standard deviation.
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If the probability that an individual sample tests positive is 0.11, what is the probability that the mixture will test positive?
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