Exam 2 Terms Flashcards
Characteristic or measure obtained by using the data values from a sample
Statistic
Characteristic or measure obtained by using all the data values from a specific population
Parameter
The sum of the total X values, divided by the total number of values
Mean
Midpoint of the data array. Symbol is MD
Median
The value that occurs most often in a data set
Mode
Data set that has two values that occur with the same greatest frequency
Bimodal
A data set that has more than two values that occur with the same greatest frequency
Multimodal
No data value occurs more than once
No mode
Majority of the data values fall to the left of the mean and cluster at the lower end of the distribution; tail is to the right.
Mean is to the right of the median, and mode is to the left of the median.
Positively skewed or right-skewed distribution
Data values are evenly distributed on both sides of the mean (when the distribution is unimodal, the mean, median, and mode are the same and at the center of the distribution)
Symmetric Distribution
Majority of the data values fall to the right of the mean and cluster at the upper end of the distribution. Mean is to the left of the median, and mode is to the right of the median.
Negatively skewed or left-skewed
Highest value minus the lowest value
Range (R)
Based on the difference or distance each data value is from the mean
Data Variation
Data variation difference or distance is called
Deviation
Binomial experiment requirements
1.) Must be a fixed # of trials.
2.) Each trial can only have 2 outcomes or outcomes that can be reduced to two outcomes.
3.) The outcomes must be independent of one another.
4.) Probability of success must remain the same for each trial.
