We chose to perform Welch's t-test as it allows for the comparison of means between two groups without assuming equal variances. The data resulted from two different populations: from captive zebras and those from Tanzania. The differences in their living conditions and genetic population have most likely resulted in variances within the two groups. Therefore, it is best to use Welch's t-test as it will provide a more accurate and reliable result by accommodating the unequal variances between the two.

data: zebra$Lysozyme by Location

F = 0.51506

Degrees of freedom = 37

Denominator degrees of freedom = 8

P-value = 0.1652

alternative hypothesis: true ratio of variances is not equal to 1

95% confidence interval: 0.1336762 1.3176088

sample estimates of the ratio of variances: 0.5150641