easons We Travel The following data are based on a survey from a travel survey on why people travel. Purpose Number of people Personal business 262 Visit friends or relatives 354 Work-related 196 Leisure 400
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.
**NOTE** Please see picture of graph attached
Reasons We Travel The following data are based on a survey from a travel survey on why people travel.
| Purpose | Number of people |
|---|---|
| Personal business |
262
|
| Visit friends or relatives |
354
|
| Work-related |
196
|
| Leisure |
400
|
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