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Forty-five participants (15 per group) were randomly assigned to preform a series of math tasks while listening to soft-gentle music, while listening to loud-intense music,

Forty-five participants (15 per group) were randomly assigned to preform a series of math tasks while listening to soft-gentle music, while listening to loud-intense music, or while in silence.

The means and estimated population variances for the three groups were:

Soft-Gentle:M= 37,S2= 28

Loud-Intense:M= 33,S2= 25

Silence:M= 41,S2= 22

6. Conducta planned contrast for the Soft-Gentle versus Silence conditions.

What does theS2Betweenequal?

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