Japanese Economy The percent change y in theJapanese gross domestic product (GDP) for yearssince 1997 is given by y = 0.0041x4 - 0.222x3 +4.287x2 - 34.8398x + 101.33417, where x is thenumber of years after 1990.a. Use graphical or numerical methods with thismodel to find the year before 1999 when thechange in the GDP was approximately 1.3 percentage points.b. According to this model, would the change in theGDP ever be 1.3% again?
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.
Japanese Economy The percent change y in the
Japanese gross domestic product (GDP) for years
since 1997 is given by y = 0.0041x4 - 0.222x3 +
4.287x2 - 34.8398x + 101.33417, where x is the
number of years after 1990.
a. Use graphical or numerical methods with this
model to find the year before 1999 when the
change in the GDP was approximately 1.3 percentage points.
b. According to this model, would the change in the
GDP ever be 1.3% again?
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