Total Items 21 Older Stats. Internet Archive's 25th Anniversary Logo. Search icon An illustration of a magnifying glass. User icon An illustration of a person's head and chest.
Sign up Log in. Learn more on statcrunch. Try it for yourself by taking a StatCrunch survey! Meet the developer Shortly after completing his PhD in Statistics at Rice University in , Webster West began developing Internet resources for statistical education.
Learn about StatCrunch. A frequency distribution shows how often items, numbers, or a range of numbers occur. It usually is given in form of a table, but could be represented graphically as well. They are appropriate for nominal or ordinal variables, or for numeric variables with a small number of distinct values.
To obtain a frequency table:. You will see that respondents were female and were male. It is often useful to obtain a graphical summary of the variables in your data. StatCrunch offers many choices, such as bar charts, pie charts, histogram, stem-and-leaf plots, box plots, and more.
The type of chart to pick depends on the type of variable numeric or categorical and on what you are trying to accomplish. We will give two examples here:. You will see a graphical representation of the frequency distribution for this variable. To create a histogram:. A contingency table is used to explore a possible relationship between two variables.
One variable is designated as row variable, the other as column variable, and the cells of the resulting table contain the number of values in that particular row and column. Contingency tables are most useful if both variables are categorical or better yet, ordinal for two numeric variables one would use a regression analysis instead. You will see, for example, that Moreover, it seems like the overall happiness is not related to the sex of the respondents. Note that a contingency table also computes the chi-square statistics for a test of independence.
In this case, the p-value for the test is 0. To conduct a chi-square test for independence, compute a contingency tables as described previously. A linear regression analysis checks if there a linear relation between two numeric variables. You can see, for example, that the equation of the least-square regression line would be:.
The sample mean of 2. StatCrunch Overview Version 0. Wachsmuth Contents Introduction. You can either redeem the license code that came with your text book or purchase a separate StatCrunch license using a credit card: 1. Start your web browser either Internet Explorer, Firefox, or Safari 2.
Windows Media Player 12 Learn more. Included in clean installs of Windows 10 as well as upgrades to Windows 10 from Windows 8. In some editions of Windows 10, it's included as an optional feature that you can enable. Enable Windows Media Player. DVD playback isn't included. Included in Windows 8. For Windows Media Player 12 for Windows 8.
Get it now.
0コメント