I NEED A POSITIVE COMMENT BASED IN THIS ARGUMENT. BETWEEN 150-200 WORDSZ-tests and T-Tests are both statistical methods used to test different hypotheses and analyze their differences. The Z test is used to decide if two population means are different when they know the variances. The best time to use a Z-test is when the sample size being used is larger than 30 and the population standard deviation is known. A T-test is used examine two population means, a two sample t-test can be used to determine if two samples are different and this test is most commonly used when the variances of two normal distributions are not known and with smaller sample sizes less than 30. The following are some of the differences that can be noted between Z-tests and the T-tests.Z-tests:Z-tests will follow normal distribution.Z-tests require their samples to be moderate to large in size (n>30).They require certain conditions be reliable tests.Z-tests are less commonly used.Z-tests are preferred when standard deviations are available.T-tests:T-tests will follow the Student’s T-distribution.T-tests are more appropriate for smaller sample sizes (n<30).T-tests are more flexible and adaptable than z-tests.T-Tests are more commonly used.Can be used if the population’s standard deviation is not known. ReferencesDifferenceBetween.net. (2010). Difference Between Z-test and T-test. Retrieved from http://www.differencebetween.net/miscellaneous/difference-between-z-test-and-t-test/Investopedia.com. (2017). Definition of T-test & Z-test. Retrieved from http://www.investopedia.com/terms/t/t-test.asp
Essay Writing Service Features
Our Experience
No matter how complex your assignment is, we can find the right professional for your specific task. Contact Essay is an essay writing company that hires only the smartest minds to help you with your projects. Our expertise allows us to provide students with high-quality academic writing, editing & proofreading services.
Free Features
Free revision policy
$10Free bibliography & reference
$8Free title page
$8Free formatting
$8How Our Essay Writing Service Works
First, you will need to complete an order form. It's not difficult but, in case there is anything you find not to be clear, you may always call us so that we can guide you through it. On the order form, you will need to include some basic information concerning your order: subject, topic, number of pages, etc. We also encourage our clients to upload any relevant information or sources that will help.
Complete the order form
Once we have all the information and instructions that we need, we select the most suitable writer for your assignment. While everything seems to be clear, the writer, who has complete knowledge of the subject, may need clarification from you. It is at that point that you would receive a call or email from us.
Writer’s assignment
As soon as the writer has finished, it will be delivered both to the website and to your email address so that you will not miss it. If your deadline is close at hand, we will place a call to you to make sure that you receive the paper on time.
Completing the order and download