What does it mean when you reject the null hypothesis?
Rejecting the Null Hypothesis
Reject the null hypothesis when the p-value is less than or equal to your significance level. Your sample data favor the alternative hypothesis, which suggests that the effect exists in the population. For a mnemonic device, remember—when the p-value is low, the null must go!
What is the null hypothesis of your study?
The null hypothesis is a typical statistical theory which suggests that no statistical relationship and significance exists in a set of given single observed variable, between two sets of observed data and measured phenomena.
What is a null hypothesis example?
The null hypothesis assumes that any kind of difference between the chosen characteristics that you see in a set of data is due to chance. For example, if the expected earnings for the gambling game are truly equal to zero, then any difference between the average earnings in the data and zero is due to chance.
What is a null and alternative hypothesis example?
The Null and Alternative Hypotheses
In our example: The null hypothesis would be: The mean data scientist salary is 113,000 dollars. While the alternative: The mean data scientist salary is not 113,000 dollars.
When the null hypothesis is rejected it is possible quizlet?
A null hypothesis is rejected when the P-value is less than the level of significance, α. Therefore, if the null hypothesis would be rejected with a level of significance of α, then the P-value is less than α. In this problem, since the null hypothesis is rejected, the P-value is less than α = 0.05.
When the null hypothesis is rejected it is quizlet?
Terms in this set (17)
If the null hypothesis is rejected, this hypothesis is accepted.
Why is null hypothesis used?
Technical null hypotheses are used to verify statistical assumptions. For example, the residuals between the data and a statistical model cannot be distinguished from random noise. If true, there is no justification for complicating the model. Scientific null assumptions are used to directly advance a theory.
How do you know if a hypothesis is null or alternative?
Null and alternative hypotheses are used in statistical hypothesis testing. The null hypothesis of a test always predicts no effect or no relationship between variables, while the alternative hypothesis states your research prediction of an effect or relationship.
Which of the following terms refers to not rejecting the null hypothesis when it is false?
A type II error does not reject the null hypothesis, even though the alternative hypothesis is the true state of nature. In other words, a false finding is accepted as true. A type II error can be reduced by making more stringent criteria for rejecting a null hypothesis.
What happens when a null hypothesis has been rejected and the null hypothesis is true quizlet?
If the NULL hypothesis is REJECTED in hypothesis testing, the alternative hypothesis is true.
In which situation would you accept the null hypothesis?
If you really did a hypothesis test (what I doubt, however) then “accepting the null hypothesis” means that “you should act as if the null hypothesis was true” (whatever this practically means should follow from the context and the research question).
In which conditions can the null hypothesis be rejected?
If there is less than a 5% chance of a result as extreme as the sample result if the null hypothesis were true, then the null hypothesis is rejected. When this happens, the result is said to be statistically significant .
When p-value is used for hypothesis the null hypothesis is rejected if?
The smaller (closer to 0) the p-value, the stronger is the evidence against the null hypothesis. If the p-value is less than or equal to the specified significance level α, the null hypothesis is rejected; otherwise, the null hypothesis is not rejected.
What happens if test results reject a hypothesis quizlet?
-In the case the null hypothesis is rejected, change the hypothesis, then retest the alternative hypothesis (false null) with another sample.
What is null hypothesis quizlet?
A null hypothesis states that there will be no difference, no effect, or no relationship between the variables.
When making a decision a researcher can either retain or reject the null hypothesis This decision is based on?
The decision to reject the null hypothesis (or not to reject it) depends on the magnitude of the test statistic. A statistic, in general, has many possible values because its value depends on the sample that is drawn. Rejection region – these are test statistic values that are less likely to occur if H0 is true.
What are the null and alternative hypothesis quizlet?
a statement about the value of a population parameter, in case of two hypotheses, the statement assumed to be true is called the null hypothesis (notation H0) and the contradictory statement is called the alternative hypothesis (notation Ha).
When stating null and alternative hypotheses The hypotheses are?
The actual test begins by considering two hypotheses. They are called the null hypothesis and the alternative hypothesis. These hypotheses contain opposing viewpoints.
Null and Alternative Hypotheses.
|equal (=)||not equal (≠) or greater than (>) or less than (<)|
|greater than or equal to (≥)||less than (<)|
|less than or equal to (≤)||more than (>)|
What are the two types of hypothesis is used in a hypothesis test how are they related?
The two types of hypotheses used in a hypothesis test are the null hypothesis and the alternative hypothesis. The alternative hypothesis is the complement of the null hypothesis. 2. Type I Error: The null hypothesis is rejected when it is true.