An educator has developed a program to improve math scores on on the Texas STAAR test. The average STAAR mathematics test for third graders in the district was a mean of 1472. A sample of n=30 third graders took the math training program before taking the STAAR math test. The average score for the students was M= 1497 with a standard deviation of s= 145. Calculate the estimated standard error of scores for the sample.
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.
An educator has developed a program to improve math scores on on the Texas STAAR test. The average STAAR mathematics test for third graders in the district was a mean of 1472. A sample of n=30 third graders took the math training program before taking the STAAR math test. The average score for the students was M= 1497 with a standard deviation of s= 145. Calculate the estimated standard error of scores for the sample.
Step by step
Solved in 2 steps with 2 images
