Difference between revisions of "Manuals/calci/TTEST"

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<div style="font-size:30px">'''TTEST(ar1,ar2,ta,ty)'''</div><br/>
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<div style="font-size:30px">'''TTEST(Array1,Array2,Tails,Type)'''</div><br/>
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*<math>ar1 </math> and <math> ar2 </math>  are the array of values.
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*<math>Array1 </math> and <math> Array2 </math>  are the array of values.
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*<math> ta </math> is the number of distribution tails.
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*<math> Tails </math> is the number of distribution tails.
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*<math> ty </math> is the type of t-test.
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*<math> Type </math> is the type of t-test.
  
  
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*It is also called student's t-test.  
 
*It is also called student's t-test.  
 
*This function is used to find the probability of two samples having the same mean but equal or unequal variances.  
 
*This function is used to find the probability of two samples having the same mean but equal or unequal variances.  
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*In TTEST(ar1,ar2,ta,ty), ar1 and ar2 are two set of array values.  
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*In TTEST(Array1,Array2,Tails,Type), Array1 and Array2 are two set of array values.  
 
*ta is indicating the number of distribution tails. ta value is either 1 or 2.  
 
*ta is indicating the number of distribution tails. ta value is either 1 or 2.  
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*If ta=1,then TTEST uses the one-tailed distrbution.If ta=2, then TTEST uses the two-tailed distrbution.ty is the type of t-Test. ty value is 1 or 2 or 3.  
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*If Tails=1,then TTEST uses the one-tailed distribution.If Tails=2, then TTEST uses the two-tailed distribution. Type is the type of t-Test. Type value is 1 or 2 or 3.  
 
{| class="wikitable"
 
{| class="wikitable"
 
|-
 
|-
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|ty value  ||          t-Test is performed
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|Type value  ||          t-Test is performed
 
|-
 
|-
 
|1      ||                Paired
 
|1      ||                Paired
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|}
 
|}
 
*Suppose we are giving ta and ty in decimals , then it will converted in to integers.  
 
*Suppose we are giving ta and ty in decimals , then it will converted in to integers.  
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*TTEST uses the value of ar1 and ar2 to find non-negative t-statistic.  
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*TTEST uses the value of Array1 and Array2 to find non-negative t-statistic.  
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*If ta=1, then it gives the probability of a higher value of the t-statistic with consideration of two arrays of samples with the same mean.  
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*If Tails=1, then it gives the probability of a higher value of the t-statistic with consideration of two arrays of samples with the same mean.  
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*If ta=2, then TTEST is gives double that when ta=1 and corresponds to the probability of a higher absolute value of the t-statistic with the consideration of same mean.  
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*If Tails=2, then TTEST is gives double that when ta=1 and corresponds to the probability of a higher absolute value of the t-statistic with the consideration of same mean.  
 
This function will give the result as error when  
 
This function will give the result as error when  
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       1. ar1 and ar2 have a different number of data points and ty=1.
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       1. Array1 and Array2 have a different number of data points and Type=1.
 
       2. Any one of the argument is nonnumeric.
 
       2. Any one of the argument is nonnumeric.
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       3. ta>2 and ty>3.
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       3. Tails>2 and Type>3.
  
 
==Examples==
 
==Examples==

Revision as of 14:43, 18 June 2018

TTEST(Array1,Array2,Tails,Type)


  • and are the array of values.
  • is the number of distribution tails.
  • is the type of t-test.


Description

  • This function gives the probability of the t-test.
  • It is also called student's t-test.
  • This function is used to find the probability of two samples having the same mean but equal or unequal variances.
  • In TTEST(Array1,Array2,Tails,Type), Array1 and Array2 are two set of array values.
  • ta is indicating the number of distribution tails. ta value is either 1 or 2.
  • If Tails=1,then TTEST uses the one-tailed distribution.If Tails=2, then TTEST uses the two-tailed distribution. Type is the type of t-Test. Type value is 1 or 2 or 3.
Type value t-Test is performed
1 Paired
2 Two-sample equal variance
3 Two-sample unequal variance
  • Suppose we are giving ta and ty in decimals , then it will converted in to integers.
  • TTEST uses the value of Array1 and Array2 to find non-negative t-statistic.
  • If Tails=1, then it gives the probability of a higher value of the t-statistic with consideration of two arrays of samples with the same mean.
  • If Tails=2, then TTEST is gives double that when ta=1 and corresponds to the probability of a higher absolute value of the t-statistic with the consideration of same mean.

This function will give the result as error when 

     1. Array1 and Array2 have a different number of data points and Type=1.
     2. Any one of the argument is nonnumeric.
     3. Tails>2 and Type>3.

Examples

Spreadsheet
A B C D E F G
1 3 5 14 10 8 2 15
2 11 19 5 4 15 7 3
  1. =TTEST(A1:G1,A2:G2,1,1)=0.399108571503
  2. =TTEST(A1:G1,A2:G2,2,1)=0.7982171430076
  3. =TTEST(A1:G1,A2:G2,1,2)=0.3725946027453
  4. =TTEST(A1:G1,A2:G2,2,2)=0.7451892054907
  5. =TTEST(A1:G1,A2:G2,1,3) = 0.37285157760157517
  6. =TTEST(A1:G1,A2:G2,2,3) = 0.7457031552031503
  7. =TTEST(A1:G1,A2:G2,2.2,1.3) = NAN

Related Videos

T-TEST

See Also

References


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