Use LEFT and RIGHT arrow keys to navigate between flashcards;
Use UP and DOWN arrow keys to flip the card;
H to show hint;
A reads text to speech;
9 Cards in this Set
- Front
- Back
a diagram consisting of rectangles whose area is proportional to the frequency of a variable and whose width is equal to the class interval. |
Histogram
|
|
used to graph distributions of numerical scores from an interval/ratio scale
|
Polygon
|
|
Similar to a histogram except that spaces are left between adjacent bars.
|
Bar Graph
|
|
Does not show absolute numbers
|
Relative Frequencies
|
|
symmetrical, with highest frequency in the middle and frequencies tapering off as you move toward either extreme
|
Normal Distribution
|
|
shows the probability associated with each value of X from x=0 to x=n. A nearly perfect normal distribution when pn & qn are both equal to or greater than 10.
|
Binominal Distribution
|
|
set of chi-square values for all of the possible random samples when null is true. Values are zero or larger. Typical chi-square distribution is positively skewed, critical region is placed in the extreme tail which reflects large chi-square values. df=c-1
|
Chi-Square Distribution
|
|
the exact shape of the F-distribution depends on the degrees of freedom for the two variables in the F-ratio with very large df values, nearly all of the F-ratios are clustered very near 1.00 with smaller df values. Distribution is more spread out. Variance is always positive.
|
F-Ratio Distribution
|
|
Approximates the shape of a normal distribution. Shape changes with degrees of freedom.
|
t-Distribution |