You are the director of public safety in Hinsdale. You want to evaluate two ambulance services that have contracted with the city to provide emergency medical aid. As part of the investigation, you have collected data showing that the following descriptive statistics about each service: Service A Service B Mean 7.6 7.1 Standard Deviation 3.9 1.2 Which service would you choose? Why?
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.
- You are the director of public safety in Hinsdale. You want to evaluate two ambulance services that have contracted with the city to provide emergency medical aid. As part of the investigation, you have collected data showing that the following
descriptive statistics about each service:
Service A Service B
Mean 7.6 7.1
Standard Deviation 3.9 1.2
Which service would you choose? Why?
Given
The mean and standard deviation of two ambulances are shown below
Our objective is to choose the best Ambulance service. So we opt for Ambulance service which have less time to provide emergency medical aid.
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