Hypothesis Z Test Vs T Test. Z tests are a statistical way of testing a hypothesis when either. How does the t test know the population variance from a single sample.
Use a right tail t test if under the alternative hypothesis the expected value of t is greater than zero. We need to check the sample means of blood pressure of an individual before and after treatment. To decide which t test to use we can apply the same rule of thumb we used for the z test.
Use a right tail t test if under the alternative hypothesis the expected value of t is greater than zero.
In the proportion case when we are doing our significance test we will set up some null hypothesis that usually deals with the population proportion we might say it is equal to some value let s just call that p sub one and. The paired sample t test is also called a dependent sample t test. We do not know the population variance but our sample size is large n 30. 6 6 e 6 accept h 0 h 0.
