PR2...... Flashcards
Guidelines in Choosing a Data Collection Method are statistical methods that refer to the analysis of data that helps describe, show, or summarize data in a meaningful way.
Descriptive statistics
- These are used to measure the middle value of the data.
- These include the mean, median, and mode
Measures of Central Tendency
- is the “average” of the given set of numbers.
- used if the level of measurement of the data is interval or ratio.
mean
- is the middle value of the data.
- ordinal
median
- is the most frequently occurring value in a data set
- nominal
mode
- These measure how spread out the scores are.
- These include the range, standard deviation, and sample variability
Measures of Variability
It is the difference between the highest and lowest score of the data. This is the simplest measure of variability
Range
It represents the spread of the scores.
Standard Deviation
- shows how varied a sample is - a value assigned to the amount of variability around the mean
- the square of the standard deviation.
Sample Variance
This refers to the estimate of the standard deviation of a sample.
Standard Error
The skewness and kurtosis can be used to describe the distribution of the data
Distribution of Data
refers to the distortion or asymmetry in a symmetrical bell curve.
skewness
distribution means that most of the data are clustered to the left side of the distribution.
Positively skewed
distribution means that most of the data are clustered to the right side of the distribution.
Negatively skewed
Skewness is less than - 1 or greater than 1.
Highly Skewed
