ormation given in the following paragraph to answer four questions that tat The

Question

ormation given in the following paragraph to answer four questions that tat The ITDS lab were different from random visit Excel the average minutes of lateness for DSCI tutors this semester. She made cel, assumine the lab for a week to collect the data. The following results are obtained with coordinator wishes to determine if the average minutes of lateness for BCIS tutor average 8 equal variances at a significance level of 0.05. t-Test: Two-Sample Assuming Equal Variances 10 Variable 2 8 8 6 Variable 1 5.545 9.473 6 Mean 12.2 6 Variance 5 Observations 6 13 10 Pooled Variance Hypothesized Mean Y Difference 0 1 df 4 tStat 3 P(Tcet) one-tail 1 t Critical one-tail 9 10 5 0.324 0.375 1.725 0.749 2.086 P(Tc t) two-tail t Critical two-tail

Explanation / Answer

The degrees of freedom for a two sample t test is computed as:

DF = n1 + n2 - 2 = 11 + 11 - 2 = 20

Where n1 and n2 are the 2 sample sizes here.

Therefore B) 20 is the correct answer here.

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