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What is it called when a sample doesn't represent the population being polled?
Bias
What process is used to make sure that survey participants are a representative sample of the population that is being studied?
double-blind selection
What is a random sample?
A random sample is a selection from the population of interest where each item (persons, households, widgets, etc.) has an equal chance of being selected. The idea being that measuring a random sample of sufficient size will accurately (within a margin of error) reflect the "true" value that exists in the population - while at the same time reducing your study to a manageable size. A random sample is integral in good survey design to reduce bias in your experiment.
What is sample and population?
A sample is a group of subjects such as selected from a population. A population deals with all different kinds of subjects that are being studied.
What is the primary characteristic of a probability sample?
In the context of a sample of size n out of a population of N, any sample of size n has the same probability of being selected. This is equivalent to the statement that any member of the population has the same probability of being included in the sample.
What do you call the selection of people population being polled?
the sample
What do we call the selection of people from the population being polled?
a sample
Do we call the selection of people from the population being polled?
a sample
What do is call the selection of people from the most population being polled?
A sample
What is it called when a sample doesn't represent the population being polled?
Bias
The best polls take a random sample from the population being polled. What does that mean?
every person in the population has the same chance of being selected.
If a cow with horns is bred to a polled bull will her offspring be polled?
Yes, the offspring has a 50% chance of being polled. The polled gene is dominant over the horned gene, so if the bull does not carry the horned gene, the offspring will not have horns.
Which type of natural selection in which the mean characteristics of a population are preserved?
This type of natural selection is called stabilizing selection because the mean traits of the population are being selected for against the immediate environment.
What is non-random selection?
A non-random selection is one in which all of the people do not have equal chance of being included in the sample.
Why doesn't natural selection cause a population to be exactly the same and What are some factors that contribute to a population not being exactly the same?
A population with differences has much better chance of surviving diseases.
What goats are good for children Polled or horned goats?
Horns can create a hazard to children, the local 4h requires that all goat being shown not have have horns. So polled would be better for a child.
Which type of natural selection favors the average individual in a population?
That would be the Stabilizing Selection where there will me not a lot of genetic variation. The curve of the population allele frequency would be quite thin with the extreme being in the middle.
