You can estimate a population's size when counting individuals if the density in a sample is greater than the population density.
equal variances
population is the number of citizens living in a defined geographical area. Sample is a number taken from the population being the sample to research for a topic about the populations' behavior or habit, etc.
If measurements are taken for two (or more) variable for a sample , then the correlation between the variables are the sample correlation. If the sample is representative then the sample correlation will be a good estimate of the true population correlation.
he population mean
they take animals into breeding pens and take a number through 100 and guess
Not a lot. After all, the sample sd is an estimate for the population sd.
large
A point estimate of a population parameter is a single value of a statistic. For example, the sample mean x is a point estimate of the population mean μ. Similarly, the sample proportion p is a point estimate of the population proportion P.
A larger random sample will always give a better estimate of a population parameter than a smaller random sample.
Capture-recapture is a good way to estimate the population size of wildlife species or other populations that are difficult to observe directly. By marking a sample of individuals, releasing them back into the population, and then recapturing a second sample, statisticians can use the overlap between the two samples to estimate the total population size.
They do not. Population size does not affect the sample size. The variability of the characteristic that you are trying to measure and the required accuracy will determine the appropriate sample size.
two samples are independent if they are drawn from two different populations, and/ or the samples have no effect on each other. eg: We want to estimate the difference between the mean salaries of all male and all female executives. We draw one sample from the population of male executives and another from the population of female executives. These two samples are independent because they come from different populations and the samples have no effect on each other Rate This Answer
You can estimate a population's size when counting individuals if the density in a sample is greater than the population density.
equal variances
The relations depend on what measures. The sample mean is an unbiased estimate for the population mean, with maximum likelihood. The sample maximum is a lower bound for the population maximum.
population is the number of citizens living in a defined geographical area. Sample is a number taken from the population being the sample to research for a topic about the populations' behavior or habit, etc.