What is correct about F-test of overall validity of the model?
1 answer:
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Answer:
Null hypothesis:
Alternative hypothesis:
Step-by-step explanation:
1) Previous concepts
A hypothesis is defined as "a speculation or theory based on insufficient evidence that lends itself to further testing and experimentation. With further testing, a hypothesis can usually be proven true or false".
The null hypothesis is defined as "a hypothesis that says there is no statistical significance between the two variables in the hypothesis. It is the hypothesis that the researcher is trying to disprove".
The alternative hypothesis is "just the inverse, or opposite, of the null hypothesis. It is the hypothesis that researcher is trying to prove".
2) Solution to the problem
Let X the random variable that represent the score for all test‑takers and the distribution for X is:
Let the true mean for the Philippines.
On this case we want to test is
So the correct system of hypothesis for this case would be:
Null hypothesis:
Alternative hypothesis:
In order to test we know the population deviation and the sample size n=250. But we need the sample mean and a significance level to test the claim.