The stem and leaf display below gives the test scores for the students in Professor Coleman's 10am and 11am management classes. There are 22 students in the 10am class and 19 students in the 11am class. Use the display to answer the questions that follow. 10am. 11am 9 8. 5 6 7 6 5 4. 6. 0 5 8 9 8 7 6 4 2. 7. 1 2 3 4 7 9 6 6 4 4 3 3. 8. 3 4 5 6 6 5 2 0. 9. 0 2 7 8 9 1. What were the ranges for the two classes? 10am 11am 2. Which class had the higher median score? 10am. 11am The median were the same 3. Which class had more scores in the 80s? 10am 11am Each had the same
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.
The stem and leaf display below gives the test scores for the students in Professor Coleman's 10am and 11am management classes. There are 22 students in the 10am class and 19 students in the 11am class. Use the display to answer the questions that follow.
10am. 11am
9 8. 5 6
7 6 5 4. 6. 0 5 8
9 8 7 6 4 2. 7. 1 2 3 4 7 9
6 6 4 4 3 3. 8. 3 4 5 6
6 5 2 0. 9. 0 2 7 8 9
1. What were the
10am
11am
2. Which class had the higher median score?
10am.
11am
The median were the same
3. Which class had more scores in the 80s?
10am
11am
Each had the same
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