SPSS output for p value
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I ran a Wilcoxon Signed Ranks test and the p value was .000
I wanted to see the actual P value not just the rounded up value (i.e. .000) so did the usual and activated the table and hovered over the p value. The figure displayed was 6.2732E-14. Other Wilcoxon tests I ran the same day were fine, i.e. when I hovered over the .000 p value the actual value was .000045 I have never seen this before and can’t find any information about it online. Can anyone enlighten me please? Thanks. -- Sent from: http://spssx-discussion.1045642.n5.nabble.com/ ===================== To manage your subscription to SPSSX-L, send a message to [hidden email] (not to SPSSX-L), with no body text except the command. To leave the list, send the command SIGNOFF SPSSX-L For a list of commands to manage subscriptions, send the command INFO REFCARD |
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The value 6.2732E-14. represents the actual p-value in standard form to get actual number move the decimal point 14 steps in the negative direction eg 6.2732E-2 = 0.062 (decimal moved 2 places to the left) 6.2732E-4 = 0.00062 (decimal moved 4 places to the left) 6.2732E+2 = 627.32 (decimal moved 2 places to the right -- ie. positive direction) 6.2732E+4 = 62732.0 (decimal moved 4 places to the right - i.e positive direction ) It is advisable to report very small p-values like these simply as P<0.001 in your report/manuscript including p=0.000045. I hope that helps Forcheh On Fri, Jun 19, 2020 at 12:17 PM Ashfield <[hidden email]> wrote: I ran a Wilcoxon Signed Ranks test and the p value was .000 |
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In reply to this post by Ashfield
What do you think is wrong here? The number is shown in scientific notation. In decimal notation it would be 0.0000000000000627 On Fri, Jun 19, 2020 at 10:17 AM Ashfield <[hidden email]> wrote: I ran a Wilcoxon Signed Ranks test and the p value was .000 |
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In addition to Jon’s comment, note that the full value (0.000000000000062732) cannot be expressed in 16 digits of precision. So, displaying the result in scientific notation gives you a little more information, although I don’t know if those additional decimal positions are meaningful or just random noise. Sent from Mail for Windows 10 From: [hidden email] What do you think is wrong here? The number is shown in scientific notation. In decimal notation it would be 0.0000000000000627 On Fri, Jun 19, 2020 at 10:17 AM Ashfield <[hidden email]> wrote:
-- Jon K Peck ===================== To manage your subscription to SPSSX-L, send a message to [hidden email] (not to SPSSX-L), with no body text except the command. To leave the list, send the command SIGNOFF SPSSX-L For a list of commands to manage subscriptions, send the command INFO REFCARD |
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