Two samples each of size 25 are taken from independent populations assumed to be

Question

Two samples each of size 25 are taken from independent populations assumed to be normally distributed with equal variances. The first sample has a mean of 34.70 and standard deviation of 3.0 while the second sample has a mean of 33.0 and standard deviation of 4.0. The computed t statistic is ________.

2.00

1.50

1.20

1.70

1.00

2.00

1.50

1.20

1.70

1.00

Two samples each of size 25 are taken from independent populations assumed to be nonmally distributed with equal variances. The first sample has a mean of 34.70 and standard deviation of 3.0 while the second sample has a mean of 33.0 and standard deviation of 4.0. The computed t statistic is 2.00 O 1.50 1.20 1.70 1.00

Explanation / Answer

fROM FOLLOWING RESULS TEST STATISTIC T=1.70

Two-Sample T-Test and CI

Sample N Mean StDev SE Mean
1 25 34.70 3.00 0.60
2 25 33.00 4.00 0.80

Difference = (1) - (2)
Estimate for difference: 1.70
95% CI for difference: (-0.31, 3.71)
T-Test of difference = 0 (vs ): T-Value = 1.70 P-Value = 0.096 DF = 48
Both use Pooled StDev = 3.5355

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