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Essentials of Statistics for the B...

8th Edition
Frederick J Gravetter + 1 other
ISBN: 9781133956570

Solutions

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Section
BuyFindarrow_forward

Essentials of Statistics for the B...

8th Edition
Frederick J Gravetter + 1 other
ISBN: 9781133956570
Textbook Problem

Research indicates that playing a prosocial video game tends to increase prosocial behaviors (Greitemeyer & Osswald, 2010). In a similar experiment, participants were assigned to play a prosocial, a violent (antisocial), or a neutral video game. Near the end of each session, the experimenter acciden­tally spilled a box of pencils on the floor and then recorded whether the participant stopped to help pick them up. The data are as follows:

  Prosocial Violent Neutral  
Helped 12 7 8 27
Did not Help 3 8 7 18
  15 15 15  

Do the data indicate a significant relationship between the type of game played and helping behavior? Test with α = .05.

To determine
If the type of game played and the helping behaviour are independent.

Explanation

Given info:

The given table shows that type of game played and the helping behaviour.

Calculation:

Observed values:

  Pro-social Violent Neutral Total
Helped 12 7 8 27
Did not help 3 8 7 18
Total 15 15 15 45

Expected values =fC×fRfT

  Pro-social Violent Neutral Total
Helped 9 9 9 27
Did not help 6 6 6 18
Total 15 15 15 45

Test statistic:

χ2=(f

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