1. consider the following data of 30 exam scores: 28, 57, , 58, 64, 69, 74, 79, 80, 83, 85 85, 87, 87, 89, 89, 90, 92, 93,94, 94 95, 96, 96, 97, 97, 97, 97, 98, 100, 100 a) Construct a table with six classes of the same width. Start with a lower limit of 25. b) Construct a histogram with six bars, labeling the x and y axis and a title. c) What is the shape of the distribution?
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.
1. consider the following data of 30 exam scores:
28, 57, , 58, 64, 69, 74, 79, 80, 83, 85
85, 87, 87, 89, 89, 90, 92, 93,94, 94
95, 96, 96, 97, 97, 97, 97, 98, 100, 100
a) Construct a table with six classes of the same width. Start with a lower limit of 25.
b) Construct a histogram with six bars, labeling the x and y axis and a title.
c) What is the shape of the distribution?
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