Two different injectable medications were given to two samples and the amount of

Question

Two different injectable medications were given to two samples and the amount of time that these two medications stayed in blood stream was measured and the following statistics was recorded for each of these two samples. The two injectable medications are called InjectMed-A and InjectMed-B InjectMed-A Statistics: mean 75.7 hours standard deviation 4.5 hours sample size 11 InjectMed-B Statistics: mean -64.3 hours standard deviation= 5.1 hours sample size 9 Construct a 98% confidence interval for the difference between the mean amount of time that InjectMed-A remained in the bloodstream and the mean amount of time that InjectMed-B remained i Degree of Freedom that was used in the computation. Assume samples distributed Populations. Do not assume that the Population standard deviations are equal. n the bloodstream. Also state the that the two are independent simple random samples selected from normally O Confidence Interval (6.08 hours, 16.72 hours) Degree of Freedom 9 confidence interval (5.92 hours, 16.88 hours) Degree of Freedom 18 Confidence Interval # (5.85 hours, 16.95 hours) Degree of Freedom- 11 O Confidence Interval = (5.79 hours, 17.01 hours) Degree of Freedom-16.18

Explanation / Answer

using stat disk

analysis>confidence intervel>mean two independent samples

enter data

set confidence intervel 0.98

ok

output

Not eq. vars: No Pool (and df calculated with Formula 9-1)

Test Statistic, t: 5.2412
Critical t: ±2.580264
P-Value: 0.0001

Degrees of freedom: 16.1844

98% Confidence interval:
5.787758 < µ1-µ2 < 17.01224

therfore answer is option 4

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