The table shows the numbers of students and teachers (to the nearest thousand) in grades K-12 in public schools in several states. The student/teacher ratio for each state is the number of students divided by the number of teachers. State # of Teachers # of Students Alabama 59,100 744,600 Florida 146,700 2,625,900 Hawaii 10,900 180,300 Iowa 34,700 479,300 Maine 16,800 193,000 Missouri 65,600 912,500 Oregon 26,500 546,600 Wyoming 6,400 84,900 a. Compute the student/teacher ratios to the nearest tenth for the following four states in the table: Alabama Florida Hawaii Iowa
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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