Rural friendships and the General Society Survey: Earlier, we considered data from the GSS on numbers of close friends people reported having. The mean for this variable is 7.44, with a standard deviation of 10.98. Let’s say that you decide to use the GSS data to test whether people who live in rural areas have a different mean number of friends than does the overall GSS sample. Again, treat the overall GSS sample as the entire population of interest. Let’s say that you select 40 people living in rural areas and find that they have an average of 3.9 friends. What is the independent variable in this study? Is this variable nominal, ordinal, or scale? What is the dependent variable in this study? Is this variable nominal, ordinal, or scale? What is the null hypothesis for this study?
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.
Rural friendships and the General Society Survey: Earlier, we considered data from the GSS on numbers of close friends people reported having. The
- What is the independent variable in this study? Is this variable nominal, ordinal, or scale?
- What is the dependent variable in this study? Is this variable nominal, ordinal, or scale?
- What is the null hypothesis for this study?
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