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Three groups of research participants have played a game with various amounts of violence and were assessed on a stress-related scale (where 0 = no stress, 100 = very stressed) afterwards. The first group of participants (Group 1) have played a non-violent game. The second group of participants (Group 2) have played a moderately violent game. The third group of participants (Group 3) have played a very violent game. The researchers would like to know if the results on a stress scale differ for these groups. What is the null hypothesis? (2 points) Your answer: What is the research hypothesis?



Answer :

Tutorconsortium423

Since, F value is =19.056 is greater than F critical value =3.3541

Therefore, We have enough evidence that null hypothesis is not rejected

What is hypothesis ?

A hypothesis is a theory that is put up to account for a phenomenon. Unless it can be tested through the scientific method, a hypothesis cannot be referred to as a scientific hypothesis. Scientific theories frequently begin with historical observations that cannot currently be fully explained by existing knowledge.

Here,

Null hypothesis,

[tex]H_{0}[/tex]: u1 = u2 =u3

u1,u2,u3 are means of stress  scale for group 1 , group 2 and group 3

Alternate hypothesis,

[tex]H_{A}[/tex] : u1≠u2

The F value is =19.056

Using F critical value α=0.05

df numerator =2 , df denominator = 27

F critical value =3.3541

Conclusion : F value is =19.056 is greater than F critical value =3.3541

Therefore, We have enough evidence that null hypothesis is not rejected

We, conclude that all three groups are equals in terms of mean.

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