Direction. For each of the following statements below, decide whether it belongs to the field of descriptive statistics or inferential statistics 1. A badminton player wants to know his average score for the past 10 games. 2. A car manufacturer wishes to estimate the average lifetime of batteries by testing. a sample of 50 batteries. 3. A politician wants to determine the total number of votes his rival obtained in the past election based on his copies of the daily tally sheets of the electoral returns.
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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