The stem and leaf display below gives sample air fare from St Louis to two cities Salt lake city and Cincinnati. There were 17 air fares recorded for the Salt lake city route and 12 recorded for the Cincinnati route. Use the display to answer the questions that follow Air fares (dollars) from St Louis Salt lake city. Cincinnati 9. 2 0. 1 5 7 6 4 1. 2 1. 0 4 5 7 8 8 7 5 5 4 3. 2 2. 1 4 8 9 9 3 0. 2 3. 4 6 3 3. 2 4 1. What were the ranges of air fares for the two routes? Salt lake city $ Cincinnati $ 2. Which route had the higher median air fare? Salt lake city Cincinnati The medians were the same 3. Which route had more air fares from $220 to $229? Salt lake city Cincinnati Each had the same
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 stem and leaf display below gives sample air fare from St Louis to two cities Salt lake city and Cincinnati. There were 17 air fares recorded for the Salt lake city route and 12 recorded for the Cincinnati route. Use the display to answer the questions that follow
Air fares (dollars) from St Louis
Salt lake city. Cincinnati
9. 2 0. 1 5 7
6 4 1. 2 1. 0 4 5 7 8
8 7 5 5 4 3. 2 2. 1 4 8
9 9 3 0. 2 3. 4
6 3 3. 2 4
1. What were the
Salt lake city $
Cincinnati $
2. Which route had the higher median air fare?
Salt lake city
Cincinnati
The medians were the same
3. Which route had more air fares from $220 to $229?
Salt lake city
Cincinnati
Each had the same
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