The null hypothesis is - stress does not play a role in an elderly person's ability to identify faces
Hypothesis testing is used to test the validity of a hypothesis using sample data
There are two types of hypothesis
1. Null hypothesis ([tex]H_{0}[/tex]) : this is known as the default hypothesis. It states that there is no relationship between between the population parameters. It is known as the true hypothesis.
In the question, the population parameters are stress and an elderly person's ability to identify faces.
Thus, the null hypothesis is - stress does not play a role in an elderly person's ability to identify faces
2. Alternative hypothesis ([tex]H_{1}[/tex]) : It states that there is a relationship between the population parameters.
The alternative hypothesis for this question is - stress plays a role in an elderly person's ability to identify faces
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