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What are the degrees of freedom for variance

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Reference no: EM131671903

Question: 1. A behavioral scientist measures attention in a sample of 31 participants. To measure the variance of attention, she computes SS = 120 for this sample.

(a) What are the degrees of freedom for variance?

(b) Compute the variance and standard deviation.

2. A student computes a variance of 9. Will the standard deviation differ if 9 is the value for a population versus a sample variance? Explain.

Reference no: EM131671903

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