On a recent biology quiz, the class mean was 15 with a standard deviation of 2.9. a. Calculate the z-score (to 4 decimal places) for a person who received score of 18. z-score for Biology Quiz: b. The same person also took a midterm in their marketing course and received a score of 78. The class mean was 75 with a standard deviation of 4.8. Calculate the z-score (to 4 decimal places). z-score for Marketing Midterm: c. Which test did the person perform better on compared to the rest of the class? Select an answer Biology Quiz Marketing Midterm
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.
On a recent biology quiz, the class mean was 15 with a standard deviation of 2.9.
a. Calculate the z-score (to 4 decimal places) for a person who received score of 18.
z-score for Biology Quiz:
b. The same person also took a midterm in their marketing course and received a score of 78. The class mean was 75 with a standard deviation of 4.8. Calculate the z-score (to 4 decimal places).
z-score for Marketing Midterm:
c. Which test did the person perform better on compared to the rest of the class? Select an answer Biology Quiz Marketing Midterm
d. Find the coefficient of variation for the Biology Quiz. Give answer as a percent to 3 decimal places.
C-Var for Biology Quiz: %
e. Find the coefficient of variation for the Marketing Midterm. Give answer as a percent to 3 decimal places.
C-Var for Marketing Midterm: %
f. Which test scores were more variable? Select an answer Marketing Midterm Biology Quiz
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