Difference between revisions of "Documentation/How Tos/Calc: ZTEST function"
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− | __NOTOC__ | + | {{DISPLAYTITLE:ZTEST function}} |
+ | {{Documentation/CalcFunc StatisticalTOC | ||
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== ZTEST == | == ZTEST == | ||
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<tt>'''ZTEST(A2:A20; 9; 2)'''</tt> | <tt>'''ZTEST(A2:A20; 9; 2)'''</tt> | ||
: returns the result of a z-test on a sample A2:A20 drawn from a population with known mean 9 and known standard deviation 2. | : returns the result of a z-test on a sample A2:A20 drawn from a population with known mean 9 and known standard deviation 2. | ||
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=== Issues: === | === Issues: === | ||
− | * Excel has referred to this as both a one-tailed and a two-tailed test. Neither is correct - the test is '''one-sided''' as described above. For example when z = -1.5 part of the left tail and all of the right tail are included. This is an unconventional measure, but can be used | + | * Excel has referred to this as both a one-tailed and a two-tailed test. Neither is correct - the test is '''one-sided''' as described above. For example, when z = -1.5 part of the left tail and all parts of the right tail are included. This is an unconventional measure, but can be used. |
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* As with all statistics, a good understanding is needed for reliable results. | * As with all statistics, a good understanding is needed for reliable results. | ||
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+ | {{SeeAlso|EN| | ||
+ | * [[Documentation/How_Tos/Calc: TTEST function|TTEST]] | ||
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+ | * [[Documentation/How_Tos/Calc: Statistical functions|Statistical functions]] | ||
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+ | * [[Documentation/How_Tos/Calc: Functions listed alphabetically|Functions listed alphabetically]] | ||
+ | * [[Documentation/How_Tos/Calc: Functions listed by category|Functions listed by category]]}} | ||
+ | [[Category: Documentation/Reference/Calc/Statistical functions]] |