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AP Statistics: Against All Odds Video 4
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Name: ___________________________
Normal Distributions
1. Very briefly describe the shape of the distribution of age in 1930.
2. The total area under any density curve is __________.
3. In a density curve the median is the point ___________________________________________________
while the mean is the point ______________________________________________________________.
4. The men of a density curve is represented by the Greek letter _____________.
5. What do we know about the mean and the median of any symmetrical distribution?
6. A Normal distribution has what shape?
7. The standard deviation of a density curve is represented by the Greek letter ____________.
8. How can we tell by looking at a Normal density curve “where” the first standard deviation out from the
mean will be?
9. For a Normal dist. the area under the curve 1 stand. dev. from the mean contains ______ of the values
2
______
3
______
10. The heights of American women are roughly Normally distributed with a mean of _______ inches and a
standard deviation of _______ inches.
11. Over the years the batting average in Major League Baseball has remained constant at approximately
________ but the standard deviation has ___________________.
12. Standardized deviation =