A student wants an A in his Math class, so must finish the semester with a 90 average. So far, he has taken 4 tests ( 90, 85, 92, 80) and taken the midterm (93). The midterm is worth 2 test grades, and the final is worth 3 test grades. What score must he achieve on the final to get an A? The grade is made up of 9 parts, so to achieve an average of at least 90, a student would need 810 (9x9) points. Add the 4 test grades and the midterm grade twice giving 6 parts. Subtract this number from 810 to find the points needed for the last 3 parts which represents the grade earned on the Final. Divide that number by 3 and round up to the next whole number to find the lowest Final grade needed to get an A for the course. The lowest Final test grade needed for an A is ______
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.
A student wants an A in his Math class, so must finish the semester with a 90 average. So far, he has taken 4 tests ( 90, 85, 92, 80) and taken the midterm (93). The midterm is worth 2 test grades, and the final is worth 3 test grades. What score must he achieve on the final to get an A?
The grade is made up of 9 parts, so to achieve an average of at least 90, a student would need 810 (9x9) points. Add the 4 test grades and the midterm grade twice giving 6 parts. Subtract this number from 810 to find the points needed for the last 3 parts which represents the grade earned on the Final. Divide that number by 3 and round up to the next whole number to find the lowest Final grade needed to get an A for the course.
The lowest Final test grade needed for an A is ______
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