Null hypothesis is the hypothesis that the effect relationship, or the other manifestations of variables and data under investigation does not exist.
I null hypothesis , a study is started in which an assumption is made that there is no difference between the experimental and control groups.
This assumption of no difference between between the experimental and control groups is known as null hypothesis.
If the results of the study indicate a P value, it indicates that there is a difference between the groups and it is determined with the help of the P value that this difference is due to chance.
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Answer:
over work causes High Blood Pressure that contributes to cardiac disease. causing you to have a heart failure.
The first major antipsychotic drug to be introduced was lithium; it was used to treat bipolar disorder.
Bipolar disorder is a behavior disease, and since lithium was made to treat behavior diseases, then it is useful today.
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