The following data was gathered on the Indianapolis 500. (Videos for many problems in this textbook are on your Blackboard site.) Year Winning time in minutes 1920 338 1930 298 1940 262 1950 Rained out 1960 216 1970 192 1980 209 1990 161
Inverse Normal Distribution
The method used for finding the corresponding z-critical value in a normal distribution using the known probability is said to be an inverse normal distribution. The inverse normal distribution is a continuous probability distribution with a family of two parameters.
Mean, Median, Mode
It is a descriptive summary of a data set. It can be defined by using some of the measures. The central tendencies do not provide information regarding individual data from the dataset. However, they give a summary of the data set. The central tendency or measure of central tendency is a central or typical value for a probability distribution.
Z-Scores
A z-score is a unit of measurement used in statistics to describe the position of a raw score in terms of its distance from the mean, measured with reference to standard deviation from the mean. Z-scores are useful in statistics because they allow comparison between two scores that belong to different normal distributions.
The following data was gathered on the Indianapolis 500.
(Videos for many problems in this textbook are on your Blackboard site.)
| Year | Winning time in minutes |
| 1920 | 338 |
| 1930 | 298 |
| 1940 | 262 |
| 1950 | Rained out |
| 1960 | 216 |
| 1970 | 192 |
| 1980 | 209 |
| 1990 | 161 |
The Indianapolis 500". Give answers to the nearest hundredth where needed. The slope of the equation means every year after the year ----- , the winning times of went down by ----- minutes. The y - intercept means that the winning time in the year-------- was------- minutes.
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