An IBM SPSS® Companion to Political Analysis by Philip H. H. Pollock III

Author:Philip H. H. Pollock III [Pollock III, Philip H. H.]
Language: eng
Format: azw3
Publisher: SAGE Publications
Published: 2015-11-16T16:00:00+00:00

This value of t, –.99, appears in the leftmost cell of the One-Sample Test table.2 Thus, ftgr_gay’s mean falls .99 standard errors below the hypothetical mean of 52. Turn your attention to the cell labeled “Sig. (2-tailed),” which contains the number .323. This is the P-value associated with the t-statistic, and it may be interpreted this way: There is a probability of .323 that the sample mean and the hypothetical mean were drawn from the same distribution of means. A less intuitive, but technically more proper, interpretation is as follows: If the difference between the two means is assumed to be 0, then random sampling error would produce the observed difference 32.3 percent of the time, by chance. So, the no-difference hypothesis holds up. From the 95% CI, we already knew that 51.63 and 52 were not significantly different. The P-value approach puts a finer point on this inference.3

Figure 6-5 Testing a Hypothetical Claim about a Sample Mean

Download

Copyright Disclaimer:
This site does not store any files on its server. We only index and link to content provided by other sites. Please contact the content providers to delete copyright contents if any and email us, we'll remove relevant links or contents immediately.