It can be said that some professions/jobs come with more stress. This stress is sometimes carried over into family life, so much so that things can become unbearable at home. A researcher who is interested in such an issue decided to collect data on the level of rage/edginess towards family members. Participants were asked to rank the level of hostility they think they have been exerting towards family members due to their job. The resulting data is presented below. *11 is the highest level of hostility. Level of hostillity Number of professionals 0-1 4. 2-3 11 4-5 8. 6-7 20 8-9 25
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.
Calculate
a. Pearson's the following1st measure of skewness
b.Interpret the results of your calculations in part a.
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