What is a normal distribution?
Normal Distribution and Standard Deviation

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•
Mathematics
•
11th - 12th Grade
•
Hard
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1.
FLASHCARD QUESTION
Front
Back
A normal distribution is a probability distribution that is symmetric about the mean, showing that data near the mean are more frequent in occurrence than data far from the mean.
2.
FLASHCARD QUESTION
Front
What is the shape of a normal distribution curve?
Back
The shape of a normal distribution curve is often referred to as a 'bell curve'.
3.
FLASHCARD QUESTION
Front
What percentage of data falls within one standard deviation of the mean in a normal distribution?
Back
Approximately 68% of the data falls within one standard deviation of the mean.
4.
FLASHCARD QUESTION
Front
What percentage of data falls within two standard deviations of the mean in a normal distribution?
Back
Approximately 95% of the data falls within two standard deviations of the mean.
5.
FLASHCARD QUESTION
Front
What percentage of data falls within three standard deviations of the mean in a normal distribution?
Back
Approximately 99.7% of the data falls within three standard deviations of the mean.
6.
FLASHCARD QUESTION
Front
What is standard deviation?
Back
Standard deviation is a measure of the amount of variation or dispersion in a set of values.
7.
FLASHCARD QUESTION
Front
If the mean of a dataset is 50 and the standard deviation is 5, what is the range for 68% of the data?
Back
The range for 68% of the data is from 45 to 55.
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