10. A college student wanting to explore the relationship between the amount of money a family spends on food, and the amount of money the family makes. They collect the following data on 20 families in a mctropolitan area. Annual Income Annual Food Expenditure (in thousands of dollars) (in thousands of dollars) Family 5.2 28 5.1 26 5.6 32 4 4.6 24 11.3 54 6. 8.1 59 7. 7.8 44 8. 5.8 30 5.1 40 10 18.0 82 a) Create a seatterplot of the data and draw an estimation of the trendline. b) Describe the correlation between Annual Food Expenditure and Annual income.
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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