QUESTION 6 Tail-chasing\" by dogs is an anxiety disorder characterized by circli

Question

QUESTION 6 Tail-chasing" by dogs is an anxiety disorder characterized by circling behavior with the dog's attention directed toward its tail. There may be many reasons for tail-chasing behaviors. To investigate the potential for biochemical causes, a study was performed at a small animal clinic at a university. Blood samples were taken from a random sample of 15 dogs brought to the clinic by owners worried about the tail-chasing behaviors of their dogs. A control group consisting of a random sample of 15 dogs brought to the clinic for other reasons contributed blood samples with the owners permission. The mean triglyceride level for the tail-chasing group was 68 mg/dl, and the standard deviation was 19.36 mg/dl. The corresponding statistics for the control group were 61 mg/dl and 11.62 mg/dl. Both sample distributions were approximately symmetric. Compute the degrees of freedom of test statistic t for the hypothesis Ho: 1-2 = 0, where 1 represents the population mean triglyceride level for tail-chasing dogs and 2 represents the population mean triglyceride level for control dogs. O1.68 23 O3.22 68 O5.15

Explanation / Answer

Degrees of freedom = 23 (option 2)

Given Data Sample 1 Sample 2 Name mean 68 61 Sample size 15 15 Std. dev. 19.36 11.62

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