A study on the oxygen consumption rate (OCR) of sea cucumbers involved a random sample of size 10 at 15oC and second random sample of size 7 kept at 18oC.If one tested the hypothesis that this range of
Temperature had no effect on the OCR (assume equal variability) the critical value would be (assume =.05)
A)1.746
B)1.761
C)2.131
D)2.145

Question

A study on the oxygen consumption rate (OCR) of sea cucumbers involved a random sample of size 10 at 15oC and second random sample of size 7 kept at 18oC.If one tested the hypothesis that this range of
Temperature had no effect on the OCR (assume equal variability) the critical value would be (assume  =.05)
A)1.746 
B)1.761 
C)2.131 
D)2.145

Quizplus · Accepted Answer

The critical value for a two-sample t-test with equal variances and degrees of freedom equal to the sum of the sample sizes minus 2 (n1 + n2 - 2) and alpha=0.05 is 2.131. Therefore, the best choice is C.

A Study on the Oxygen Consumption Rate (OCR) of Sea