3. Suppose you are asked to use the students in your current statistics class as a sample from the population of all students at your school. This is not literally a random sample, but whether or not this sample is representative of the population could depend on the variable of interest. For each of the following variables, discuss whether you think the sample would be representative of the population. Briefly explain your answers. a. Sex b. Time spent sleeping last night c. Knowledge of statistics d. Political party affiliation e. Number of movies seen in past year f. Age
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.
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