STA 2023 Lecture Notes - Lecture 5: Categorical Variable, Mastercard, Frequency Distribution
Document Summary
A measure of central tendency is a value that represents a typical, or central, entry of a data set. The most commonly used measures of central tendency are the mean, the median, the mode and the midrange. A statistics is a characteristic or measure obtained by using the data values from a. A parameter is a characteristic or measure obtained by using all the data values sample. We"ll use roman (cid:523)english(cid:524) letters to denote statistics. We"ll use greek letters to denote parameters from a specific population. General rounding rule: in statistics the basic rounding rule is that when computations are done in the calculation, rounding should not be done until the final answer is calculated. The mean can be though of as the balancing point of a distribution of data. The mean of a data set is the sum of the data entries divided by the number of entries divided by the number of entries.
