The Math coordinator at Houston Community College collected the following data from first and second year students enrolled in the department's Spring classes. Any given student could only have been enrolled in one course. First year (A) Second year (B) Total MATH 1324 (X) 31 15 46 MATH 1314 (Y) 43 36 79 MATH 1332 (Z) 25 52 77 Total 99 103 202 Use the table above to answer the following: a. If a student is selected at random, what is the probability the student is a first year or a second year student? b. If a student is selected at random, what is the probability the student is not taking MATH 1324 and is not taking MATH 1332? c. If a student is selected at random, what is the probability the student is not taking MATH 1324 or is not taking MATH 1332?
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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