Psychology Research Method 2 Descriptive statistics: Presents information about data at a glance. Gives the overall idea of the results of the experiment. Eg. Summary statistics: Mean, median, mode. Histogram: Type of graph used to report the number of times groups of values appear in a data set. Frequency Distribution: Type of graph illustrating the distribution of how frequently values appear in the set. Normal Distribution: A distribution with a characteristic smooth, symmetrical, bell shaped curve containing a single peak. Measures of Central Tendency: Mean, Median, Mode: Mean: The average value of a data set. Very susceptible to outliers. Outliers: Extreme points, distant from others in a data set. Mode: Value that appears most frequently in the set. Median: The centre value in a data set when the set is arranged numerically. Measure of Variability: - Standard deviation: A measure of the average distance of each data point from the mean. Larger standard deviation means more “spread out” than data sets with smaller standard deviation.
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- Winter '14