Download presentation

Presentation is loading. Please wait.

Published byAlison Newman Modified over 2 years ago

1
Appendix A

2
Descriptive Statistics

3
Statistics used to organize and summarize data in a meaningful way

4
Frequency Distributions

5
A summary of how often various scores occur in a sample of scores. Score values are arranged in order of magnitude, and the number of times each score occurs is recorded

6
Histogram

7
A way of graphically representing a frequency distribution; a type of bar chart that uses vertical bars that touch

8
Frequency polygon

9
a way a graphically representing a frequency distribution; frequency is marked above each score category on the graph’s horizontal axis, and the marks are connected by straight lines

10
Skewed Distributions

11
An asymmetrical distribution; more scores occur on one side than the other; In a positively skewed distribution, more scores are low

12
Symmetrical Distribution

13
A distribution in which the scores fall equally on both sides of the graph, the normal curve is an example

14
Measure of Central Tendency

15
A single number that presents some information about the “center” of a frequency distribution

16
Mode

17
The most frequent occurring score in a distribution

18
Median

19
The score that divides a frequency in half, so that the same number of scores lie one both sides

20
Mean

21
The sum of a set of scores in a distribution divided by the number of scores; the mean is usually the most representative measure of central tendency

22
Measure of Variability

23
A single number that presents information about the spread of scores in a distribution

24
Range

25
A measure of variability; the highest score distribution minus the lowest score

26
Standard Deviation

27
A measure of variability; expressed as the square root of the sum of the squared deviations around the mean divided by the number of scores in the distribution

28
z Score

29
A number, expressed in standard deviation units, that shows a score’s deviation from the mean

30
Standard Normal Curve

31
A symmetrical distribution forming a bell- shaped curve in which the mean, median, and mode are all equal and fall in the exact middle

32
Correlation

33
The relationship between two variables

34
Correlation Coefficient

35
A measure of the magnitudes and directions of the relationships between two variables. The closer the correlation is to +1 or –1, the stronger the relationship is. A positive correlation coefficient indicates that as one variable increase, the other tends to increase, the negative correlation coefficient indicates as one variable increases, the other tends to decrease

36
Scatter Diagram

37
A graph that represents the relationship between two variables

38
Inferential Statistics

39
Statistical techniques that allow researchers to determine whether the outcomes in a study are likely to be more than just chance events and whether they can legitimately generalized to a larger population

40
Population

41
A complete set of something-people, nonhuman animals, objects, or events

42
Sample

43
A subset of a population

Similar presentations

OK

Two basic types Descriptive Describes the nature and properties of the data Helps to organize and summarize information Inferential Used in testing.

Two basic types Descriptive Describes the nature and properties of the data Helps to organize and summarize information Inferential Used in testing.

© 2017 SlidePlayer.com Inc.

All rights reserved.

Ads by Google

Ppt on satellite orbits Pdf to ppt online free Ppt on pricing policy for services Ppt on sources of energy class 10 download Ppt on life and works of robert frost Ppt on articles a an the Ppt on nuclear family and joint family images Ppt on natural resources and their conservation Ppt on x ray diffraction Powerpoint ppt on communication skills