The number of points reached by students in a test were as follows: 30, 59, 44, 56, 78, 90, 86, 57, 98, 70, 42. Determine: the range the median 1st quartile 3rdquartile the interquartile range for this data set.
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 number of points reached by students in a test were as follows:
30, 59, 44, 56, 78, 90, 86, 57, 98, 70, 42. Determine:
- the
range - the
median - 1st
quartile - 3rdquartile
- the
interquartile range for this data set.
Step by step
Solved in 5 steps with 5 images
