sarah19Nursing
15.04.2020 •
Mathematics
is a fundamental difference between the t statistic and a z-score
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Ответ:
Step-by-step explanation:
- The Z-score allows you to decide if your sample is different from the population mean. In order to use z, you must know four things:
The population mean. The population standard deviation. The sample mean. The sample size.- Usually in stats, you don’t know anything about a population, so instead of a Z score you use a T-Test with a T Statistic.
- The major difference between using a Z score and a T statistic is that you have to estimate the population standard deviation. The T test is also used if you have a small sample size (less than 30).
Ответ:
Step-by-step explanation:
Putting value of x in the equation
2x2
2(3)2
2(9)
= 18