Probability and Statistic on Z-Test

Table of Contents Z-TEST4 Z-TABLE5 Z-TEST ONE homo MEAN6 Z-TEST ONE humanity PROPORTION9 Z-TEST TWO reciprocalwealth 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 non known, accordingly the come on standardised remainder can be used. The Z-test can be applied in two ways: 1. champion-Sample Mean analyze 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 creation bastardly. From the en sample distribution data, we try to compare the sample soaked to the perceive population mean. This test, known as one-samp le mean test, requires the knowledge of the population mean and population standard deviation. However, if the population standard deviation is not known, therefore 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 honor of the population mean ? population standard deviation n sample size The tabular value for Z-test at specified level of meaning is given under The tabular Value of Z at .01 and .05 aim of deduction 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 jilted and the alte! rnative 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 normality of data, then test...If you want to get a full essay, order it on our website: OrderEssay.net

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