3. There are several methods for calculating fuel economy. The following table indicates the mileage as calculated by owners and by current government standards for nine car models: Car Owner Government 2005 Ford F-150 14.3 16.8 2005 Chevrolet Silverado 15.0 17.8 2002 Honda Accord LX 27.8 26.2 2002 Honda Civic 27.9 34.2 2004 Honda Civic Hybrid 48.8 47.6 2002 Ford Explorer 16.8 18.3 2005 Toyota Camry 23.7 28.5 2003 Toyota Corolla 32.8 33.1 2005 Toyota Prius 37.3 56.0 a. Construct a scatter plot with owner mileage on the X axis and current government standards mileage on the Y axis. b. Does there appear to be relationship between owner and current government standards mileage? If so, is the relationship positive or negative? 作答
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.
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