A set of 1100 exam scores is normally distributed with a mean = 78 and standard deviation = 4.How many students scored higher than 78? How many students scored between 74 and 82? How many students scored between 70 and 86? How many students scored between 78 and 82? How many students scored lower than 74? How many students scored lower than 82?
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 set of 1100 exam scores is
How many students scored higher than 78?
How many students scored between 74 and 82?
How many students scored between 70 and 86?
How many students scored between 78 and 82?
How many students scored lower than 74?
How many students scored lower than 82?
Trending now
This is a popular solution!
Step by step
Solved in 5 steps with 7 images
