P Value T Test Chart. Open the t test function in any of the cells in the spreadsheet. Prob t 50 t 75 t 80 t 85 t 90 t 95 t 975 t 99 t 995 t 999 t 9995 one tail 0 50 0 25 0 20 0 15 0 10 0 05 0 025 0 01 0 005 0 001 0 0005 two tails 1 00 0 50.
Select the array 1 as before the diet column. The p value is a number calculated from a statistical test that describes how likely you are to have found a particular set of observations if the null hypothesis were true. Your t score goes in the t score box you stick your degrees of freedom in the df box n 1 for single sample and dependent pairs n 1 1 n 2 1 for independent samples select your significance level and whether you re testing a one or two tailed hypothesis if you re not sure go with the.
P values are used in hypothesis testing to help decide whether to reject the null hypothesis.
P value excel example 2 find p value with t test function. This distribution table shows the upper critical values of t test. Select the array 1 as before the diet column. These have the form p t u for the t tail areas and p 2 c for the 2 tail areas.
