tions that follow Use the oordinator wishes to determine if the average minutes
ID: 2933293 • Letter: T
Question
tions that follow Use the oordinator wishes to determine if the average minutes of lateness for BCIS tut visits o the average minutes of lateness for DSCI tutors this semester. She made tExcel, assuth lab for a week to collect the data. The following results are obtained with rmation given in the following paragraph to answer four questions tha The ITDS lab c were different from random visits of average ning equal variances at a significance level of 0.05 Tutors BCIS DSCI t-Test: Two-Sample Assuming Equal Variances 1 2 10 Variable 2 Variable 1 5.545 9.473 6 Mean Variance 12.2 6 5 Observations 6 13 10 Pooled Variance Hypothesized Mean Y Difference 9 10 0.324 0.375 1.725 0.749 2.086 5 t Stat 3 P(TExplanation / Answer
Given that,
mean(x)=6
standard deviation , s.d1=3.492849
number(n1)=11
y(mean)=5.545
standard deviation, s.d2 =3.07782
number(n2)=11
calculate pooled variance s^2= (n1-1*s1^2 + n2-1*s2^2 )/(n1+n2-2)
s^2 = (10*12.199994 + 10*9.472976) / (22- 2 )
s^2 = 10.836485
we use test statistic (t) = (x-y)/sqrt(s^2(1/n1+1/n2))
to=6-5.545/sqrt((10.836485( 1 /11+ 1/11 ))
to=0.455/1.403663
to=0.324152
| to | =0.324152
pooled variance = s^2 = 10.836485 = 10.84
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