a. Solve the standard deviations of the following distributions of grouped scores: (Class interval, Frequency) 30-34, 2; 35-39, 3; 40-44,6 ; 45-49, 7; 50-59, 7; 60-64,5 ; 65-69, 4; and 70-74, 2. b. solve for the group variance
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. Solve the standard deviations of the following distributions of grouped scores: (Class interval, Frequency) 30-34, 2; 35-39, 3; 40-44,6 ; 45-49, 7; 50-59, 7; 60-64,5 ; 65-69, 4; and 70-74, 2.
b. solve for the group variance
Step by step
Solved in 3 steps
