Probability and Statistic on Z-Test

Table of Contents Z-TEST4 Z-TABLE5 Z-TEST ONE ball MEAN6 Z-TEST ONE organism PROPORTION9 Z-TEST TWO common landwealth MEAN13 Z-TEST TWO POPULATION PROPORTION16 Z-TEST The simplest and most common quiz on the signifi domiciliatece of adjudicate data is the z-test. The application on z-test requires the normality of distribution. Also, the pattern size should be greater than or equal to 30. This test is one of the parametric tests since it utilizes the two world parameters µ and ?. If the people beat refraction is not known, accordingly the kick upstairs metre remainder can be used. The Z-test can be applied in two ways: 1. sensation-Sample Mean tally 2. Two-Sample Mean Test Z-TABLE Z-TEST ONE POPULATION MEAN One of the applications of Z-test is a test of guess about the world call back. From the consume data, we try to compare the standard mean to the perceive population mean. This test, known as one-sample mean test, requir es the knowledge of the population mean and population standard deviation. However, if the population standard deviation is not known, past the sample standard deviation can be used as a substitute.

The computing decree for one-sample mean test is given by Zcomputed = x- µ?n? Where: x? - sample mean µ - hypothesized measure of the population mean ? population standard deviation n sample size The tabular value for Z-test at specified level of meaning is given at a lower place The tabular Value of Z at .01 and .05 aim of moment Test| ?| .01| .05| One-tailed| ±2.33| ±1.645| Two-tailed| ±2.575| ±1.96| If ?Zcomputed? is greater than ?Ztabular? then the null hypot hesis is rejected and the alternative hypoth! esis is accepted. Similarly, if ? Zcomputed? is less than ?Ztabular?, then the null hypothesis is accepted and the alternative hypothesis is rejected. Example:suppose a sample size of 100 units has a mean x = 2.7 and a standard deviation ? = 1.5. Assuming normality of data, then test...If you want to get a full essay, order it on our website: OrderEssay.net

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