Summary statistics are given for independent simple random samples from two populations. Preliminary data analyses indicate that the variable under consideration is normally distributed on each population. Decide whether use of the pooled t-test and pooled t-interval procedure is reasonable. Explain your answer.
1 = 143.9, s
1 = 13.2, n
1 = 7,
2 = 212.9, s
2 = 43.7, n
2 = 17
◦ Reasonable; the sample standard deviations suggest that the two population standard deviations differ, however since the sample sizes are roughly equal, it is reasonable to use the pooled t-test.
◦ Reasonable; the sample standard deviations suggest that the two population standard deviations are equal.
◦ Not reasonable; the sample standard deviations suggest that the two population standard deviations are equal, however since the sample sizes are not roughly equal, it is not reasonable to use the pooled t-test.
◦ Not reasonable; the sample standard deviations suggest that the two population standard deviations differ and the sample sizes are not roughly equal.
The age structure of human populations in West Africa and Western Europe, as of 2000.
Independent Assortment
A Summary of the Star Formation Process
Head binding, or artificial deformation, was used by some populations as a sign of identity.
Summary of Antidiabetic Drug Classes
Action Potential Summary