A veterinarian does research on the causes of enteroliths, stones that develop i
ID: 3231744 • Letter: A
Question
A veterinarian does research on the causes of enteroliths, stones that develop in the colon of horses. She suspects that feeding alfalfa might be a cause. To investigate that suspicion, she selects five horses that are known to have enteroliths and compares the number of flakes of alfalfa they have eaten over a month with the number of flakes eaten by five horses free of enteroliths. Based on the following data, a 95% confidence interval is given by: n s Enteroliths group: 5 45 12 Healthy group: 5 28 10
(–2.392, 36.392)
(–28.000, 45.000)
(0.799, 33.201)
(–2.378, 25.689)
Explanation / Answer
The statistical software output for this problem is:
Two sample T confidence interval:
1 : Mean of Population 1
2 : Mean of Population 2
1 - 2 : Difference between two means
(without pooled variances)
95% confidence interval results:
Hence,
95% confidence interval will be:
(0.799, 33.201)
Option C is correct.
Difference Sample Diff. Std. Err. DF L. Limit U. Limit 1 - 2 17 6.9856997 7.7480479 0.79930994 33.20069Related Questions
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