A Forecast of "Chance of Precipitation" Means the Probability of Precipitation

question 88

Multiple Choice

A forecast of "chance of precipitation" means the probability of precipitation is

• A)between 0 and 20 percent.
• B)between 30 and 50 percent.
• C)​between 50 and 60 percent.
• D)​between 60 and 70 percent.
• E)​greater than 80 percent.

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Definitions:

Mean

The average of a set of numbers, calculated by dividing the sum of the values by the number of values.

Standard Normal Variable

A standard normal variable is a random variable that follows a normal distribution with a mean of zero and a standard deviation of one.

Standard Normal Distribution

A normal distribution with a mean of 0 and a standard deviation of 1, serving as a basis for comparison for other distributions.

Mean

The arithmetic average of a set of values, calculated by adding all the values together and dividing by the number of values.