Statistics based on laws of probability, allowing researchers to reach conclusions about a population based on data from a sample.
inferential
Statistics used to summarize and describe quantitative data.
descriptive
The most stable measure of central tendency.
mean
Measures of _____ represents how spread out the data are
variability
_____ coefficients describe the direction and magnitude of a relationship between two variables
correlation
Used test the significance of differences in three or more group means.
anova
Used to test the significance of differences in two group means.
ttest
Characteristic of a normal distribution
symmetrical
A distribution with more than one peak
multimodal
Distribution that peaks to the right
negative
Distribution that peaks to the left
positive
Value that occurs most frequently
mode
Point above which and below which 50% of the cases fall
median
Distance between highest and lowest scores
range
The standard _____ indicates how much, on average, scores deviate from the mean.
deviation
Number of standard deviations above and below the mean that 95% of the values lie within in a normal distribution
two
Type of hypothesis which states no relationship between variables
null
_____ of the null hypothesis lends support to the research hypothesis.
rejection
A correlation coefficient of +1.00 would indicate a perfect _____ correlation
positive
A correlation coefficient of -1.00 would indicate a perfect _____ coefficient
negative
Characteristic of a population
parameter
Statistically _____ refers to the Unlikelihood that the results are due by chance
significant
Probability of making a Type I error
alpha
Probability of making a Type II error
beta
An (r) represents this commonly used correlation index
pearson
Type of test used to test hypotheses about the proportion of cases in different categorie
chisquared