Probability and Statistic on Z-Test

Table of Contents Z-TEST4 Z-TABLE5 Z-TEST ONE universe of discourse MEAN6 Z-TEST ONE human beings PROPORTION9 Z-TEST TWO generalwealth 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 picture precedent remainder can be used. The Z-test can be applied in two ways: 1. unity-Sample Mean exemplar 2. Two-Sample Mean Test Z-TABLE Z-TEST ONE POPULATION MEAN One of the applications of Z-test is a test of possible action about the creation imply. From the essay data, we try to compare the sample take to be to the perceive population mean. This test, known as on e-sample mean test, requires the knowledge of the population mean and population standard deviation. However, if the population standard deviation is not known, consequently 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 pry of the population mean ? population standard deviation n sample size The tabular value for Z-test at specified level of meaning is given to a lower place The tabular Value of Z at .01 and .05 aim of signification Test| ?| .01| .05| One-tailed| ±2.33| ±1.645| Two-tailed| ±2.575| ±1.96| If ?Zcomputed? is greater than ?Ztabular? then the null hypothesis is rejected and the alternative hypothesis 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 norm! ality of data, then test...If you want to get a full essay, order it on our website: OrderEssay.net

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