The flu shot changes every year in an effort to predict the strain that will be going around each year, and some years it is mor
e effective at preventing the flu than others. A group of researchers wants to compare the effectiveness of the flu shot this year to the flu shot last year. Null:
Alternative:
Is this hypothesis directional or non-directional?
if a group of researchers want to compare the effectiveness of the flu shot this year to the flu shot last year then is a directional hypothesis
Explanation:
A directional hypothesis this is simply the prediction made by a researcher concerning a positive or a negative change, relationship, or difference between the two variables that are being contained in a population.
A type I error: this is simply a situation whereby we a reject a true null hypothesis. while
A type II error is simply the non-rejection of a false null hypothesis.
Family history is the top risk factor for a person to get an Alzheimer's disease. This is because of heredity that a person cannot escape from. So it is important that a person must know the family history whether he or she can be a dominant carrier of this disease or not.
