Question 1
If the process of selecting individuals or objects in sample 1 has no effect on, or no relation to, the selection of individuals or objects in sample 2, the samples are:
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independent.
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dependent.
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discrete.
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paired.
Question 2
If the underlying populations are normally distributed and both population variances are equal, the test statistic
\(\style{font-family:Times New Roman;}{\frac{{\overline X}_1-{\overline X}_2-\Delta_0}{S_p^2\sqrt{\frac1{n_1}+\frac1{n_2}}}}\)
follows a:
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standard normal distribution if both samples are large.
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Student’stdistribution with\(\style{font-family:Times New Roman;}{n-1}\)degrees of freedom.
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standard normal distribution with\(\style{font-family:Times New Roman;}{n_1+n_2-2}\)degrees of freedom.
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Student’stdistribution with\(\style{font-family:Times New Roman;}{n_1+n_2-2}\)degrees of freedom.
Genetic drift and population size.
Animal extinctions and human population growth.
Population Interactions and Communities
Write the equation for the population y at any instant
Population Pyramids
Population and Settlement